Device for detection of harmful substances in air

FIELD: measurement equipment.

SUBSTANCE: invention relates to ecology, namely to sanitary-chemical control of the state of environment and can be used for solution of tasks for detection and measurement of harmful substance concentrations in the air. A device for detection of harmful substances in the air includes an air flow booster and the primary chemical transducer; with that, the air flow booster includes the following: a control unit providing setting of parameters of bleed air, operation and control of the device; an air path for transportation of an air flow; an air pump connected to the control unit for pumping of air through the air path; a self-contained power source, and the primary chemical transducer is connected to the air path. With that, the device includes flow and temperature sensors of the pumped air, which are arranged in the air path, as well as sensors of atmospheric pressure and relative humidity of the pumped air, which are arranged outside the air path, and the control unit includes an information display device; at least one control button and an electronic circuit providing the following: recording of data from sensors; determination of air density; control of volumetric flow of the pumped air; adjustment of air sampling time, and analogue-to-digital conversion of the obtained and transmitted data.

EFFECT: improving accuracy of taken air volumes; increasing quick action of operation of the device; control and fixation of parameters of the taken air (volumetric air flow rate, atmospheric pressure, temperature and humidity); increasing ease of use; improving accuracy of readout of information from the primary chemical transducer; providing technical control and fixation of colorimetric changes of the primary chemical transducer; reducing overall dimensions and the weight of the device; enlarging functional capabilities.

24 cl, 1 dwg

 

The invention relates to the field of ecology, in particular for sanitary-chemical control of the environment, and can be used for solving problems of detection and measurement of concentrations of harmful substances in the air.

The known device for measuring the qualitative and quantitative composition of air, comprising: a pump flow rate (pump-sampler), providing air sampling with a given flow rate for a certain period of time; the primary chemical converters (indicator tube indicator paper, ribbon, flat elements, impactors, sorption tubes and other); devices providing the transfer of the signal from the primary chemical transducer in units of concentration of harmful substances (guidance on the control of harmful substances in the air of working zone), Chemistry, 1991, pp. 26-30, 62-75). The consumption booster provides a process of concentration of harmful substances on solid media. After selection of a certain volume of air determination of harmful substances is the instrument or visual methods. The determination process can be conducted either on the surface of the sorbent, as is the case when using indicator tubes, tapes, impactors, and others, and after removing physical and/or chemical methods (thermal methods, microwave heating, l is sernai evaporation and other). Such analytical techniques are implemented using sorption tubes in the techniques of gas chromatography, mass spectrometry, ion mobility spectrometry and other

Among the existing precursors of consumption known mechanical and automatic suction device. Mechanical pumps samplers are, as a rule, suction bellows type: S-5 (http://www.labteh.com/productID18323/), AM-0059 (http://www.laborkomplekt.ru/?iid=4262&page=7&sid=7&srid=68), Russia; aspirators company Drager, Germany www.sorbent.su/production/drager/Drager.pdf), hand pump Gas-Tester II MSA firm Auer, Germany; (http://s7d9.scene7.com/is/content/minesafetyappliances/safetySCOPE%20catalog%202012%20-%20RU), or plunger-type: VPHR (http://www.tetra-service.ru/index.php?page=shop.product_details&flypage=shop.flypage&product_id=176&category_id=23&manufacturer_id=0&option=com_virtuemart&Itemid=92), NP-3M (http://nikimlt-povolgye.ru/catalog_lvl3/?id=596), Russia; Gastec (labdepot.tiu.ru/p6743456-nasosy-aspiratory-gastec.html), Kitogava (http://christmas-plus.ru/sampler/import/03), Japan. The work of this group absorbers based on the creation of a vacuum by manual compression of the spring bellows suction pump or the moving rod of the plunger. Aspirators allow a sufficiently high accuracy of selection of specific volumes (error selected volumes of air for a number of structures does not exceed 10%). The disadvantages of mechanical devices should include inability sampling of air, the volume of which nekritin number of stroke plunger the first pump or the volume of the bellows. During air sampling, using these devices is a process flow changes over time. This uncontrolled factor depending on the aerodynamic resistance of the primary chemical of the transducer affects the precision characteristics of sampled volume of air, which, ultimately, leads to an increase in error of measurement of concentrations of harmful substances.

Another type precursors consumption are the suction device of the automatic type. In this series known electroaspirators providing air sampling in a wide range of volumetric flow of air. Conditionally they can be divided into two groups depending on their performance and purpose. So, boosters consumption, providing volumetric charges from 0.1 to 3 l/min, used for automatic sampling of gases and vapors, and devices with costs from 3-400 l/min, most often are used for analysis of dust, suspended solids and fine liquid and solid aerosols. The group with high costs include industrial output device: PINOCCHIO SUPER II, Italy (http://www.internationalpbi.it/docs/Minisiti/SAS/Vers.Inglese/leaflets/pinocchio-super-II.pdf), multi-channel automatic suction type AR-4 (http://www.labteh.com/productID2370/). Installation type UE: UE 1222 - pneumatic 4-channel with a flow rate of 20 l/min; UE 124 AU - pneumat the ical 3-channel with a flow rate of 46 l/min; UE 1124 AU - pneumatic 4-channel with a flow rate of 62 l/min; pack 1224 SA - pneumatic 4-channel with a flow rate of 81 l/min; UE 1122 AU and UE 1122/55 SRH - pneumatic 4-channel with a flow rate of 42 l/min (set the timer and six rotameters) (http://ecolab.kiev.ua/index.php?page=2&cPath=1_2_1846_1847); the Sampling device of the type PU: PU-3E/12 and PU-3 e/1-5 220 channels, with a flow rate of 400 l/min from an external or built-in battery (12V-220V) (http://ximko.ru/fullmag.php?bc_tovar_id=3); Samplers type Typhoon: Typhoon R-2-2 (MC) 2-channel portable; Typhoon R-20-2 (MS) portable suction 2-channel; Typhoon R-20-20-2-2 (EBM) 4-channel portable (http://standart-m.com.ua/izmeritelnye-pribory/aspiratory/aspiratory-tajfun). These devices are intended for sampling air with a given flow rate for a specified period of time. The boosters of consumption of this type are used for sampling air containing suspended solids and aerosols on filters. Air intake device of this type are not implemented for the detection and measurement of concentrations of harmful substances in the gas-vapor state, due to the considerable turbulence of the air flow and, as a consequence, violations of mass transfer processes. Such devices are ineffective because the sorption tube, like many other primary chemical converters have high enough Aero is enomicheskie resistance to air flow, anything significantly complicates the measurement and adjustment of the volume of expenditure, or do not work in these modes.

To the group of precursors flow used for the detection and measurement of concentrations of harmful substances in the air, can be attributed to a series of automatic aspirator, creating a relatively low cost desired degree of vacuum in the air tract that provides the basic conditions of primary chemical converters type: indicator tube, paper, tape, etc. these include automatic suction produced by domestic and foreign manufacturers: PPR, UPGK (Russia); operating operating-2000 Drager, Toxi-meter® II MSA Auer (Germany).

The consumption booster PPR is designed for sampling of air through the indicator tube with a volume flow rate of 1-3 l/min (http://lib.znate.ru/docs/index-210430.html?page=10). The disadvantages of this sampling device are: inability to control the volumetric flow; the pulsations of the pump; the need to manually control the time of sampling; large error selected volume; the inability to create the necessary vacuum to work for a number of indicator tubes.

Automatically operating operating-2000 Drager (Germany), reproducing the process of manual compression of the bellows, the dosing of the sample carried out by the project with the help of the control unit the necessary amount of compression of the bellows (http://www.laborant.net/catalog/izmeritelnoe_oborudovanie_1001/gazovyjj_analiz_1008/aspiratory_1009/aspirator_accuro_2000_drager_p1858, the Federal Republic of Germany patent No. 3821831, IPC G01N31/22, publ. 04.01.90). The device is characterized by limited functionality and is only used for sampling when working with test tubes manufactured by Drager. The presence of a bellows pump allows you to implement only periodic mode sampling air. In the design of the booster does not provide the ability to control the flow of air in the sampling process. The device is not equipped with the necessary transitional devices and attachments, and does not allow to control contamination of the surfaces of objects and the ground.

Automatic device - Toximeter II is designed for the measurement of concentrations of harmful substances in the air. At the same time as the primary chemical converters can be used flat and probatory tube. When sampling on sorption tube on the device display, you can set the duration of the sampling or its volume. The air sampling can also be carried out in the gas bags or bottles with the collector fluid. The device can be used when working in hazardous conditions. Compared with manual aspirators booster can significantly reduce costs when measuring the concentration of toxic substances. In case of battery discharge allowable replacement battery pack in bursts is opasnyh conditions www.tex-x.ru/media/24767/-MSA-SAFETY_2013.pdf). The drawbacks Toximeter II are: unregulated, low flow sampling, not in excess of 0.333 l/min; - lack of opportunities to work with indicator tubes, requiring higher costs.

The closest to the essential features of the claimed device is selected as a prototype device for the determination of hazardous substances in the air, containing the pump flow and the primary chemical Converter, the pump flow includes: a control unit that provides the setting parameters of sampled air, operation and control device; vozduhoprovodyaschih path for transporting air stream; coupled with a control unit of an air pump for pumping air through vozduhoprovodyaschih tract; an Autonomous power source, and the primary chemical transducer attached to vozduhoprovodyaschih tract. As the power source can be used independent source such as the battery or network DC or AC 220 V or 18 C. the control Unit and information processing provides the task of the parameters of sampled air, control and operation of the device. The device comprises a volumetric dosing system, including connected with the air tract camera dispensing with the embedded differential pressure sensor. The device includes connected with a control unit heating element (termodesorber), channel products thermal desorption, the system pneumoelectroservice. At the exit of the air tract UPGK installed shutoff valve (patent RF №2088918 for the invention of "gas control", IPC G01N 31/22, G01N 21/78, publ. 27.08.1997). The presence of the metering system provides a fixed sampling volume of air that allows both periodic and continuous modes of operation. The device, mainly due to the camera's metering has greater overall dimensions. The main drawback is the lack of control: the volume flow rate in the sampling process, the temperature of the bleed air, atmospheric pressure and relative humidity in the sampling process, making it difficult to determine the accuracy characteristics of selected volumes. The device does not allow same apparatus and methods to control the colorimetric change of the primary chemical converters, and the unit of the prototype does not have the capability of reading and digital information processing from the primary chemical converters, which affects the accuracy of reading data from the primary chemical transducer and the performance of the device. Device is on has no special devices, providing convenience and simplification of manual operations when using the indicator means, scrivanie vials. The use of the device in the non-stationary (field) conditions difficult, which negatively affects the technical performance of the device.

The task, which is aimed by the invention is a device for the determination of hazardous substances in the air, with a higher metrological characteristics of the selection of specific volumes of air, including the costs of 0.2÷3,0 l/min, in the temperature ranges -40÷+50°C atmospheric pressure of 730÷790 mm Hg and a relative humidity of 30÷90%.

Technical results achieved in all cases, implementation of the proposed technical solutions are:

improving accuracy of sampled air volumes;

- improve performance of device operation;

- ensure monitoring and recording of parameters sampled air volume flow of air, atmospheric pressure, temperature and humidity);

improving ease of use.

Technical results to be achieved in some cases, implementation of the proposed technical solutions are:

improving accuracy of reading information from the primary chemical transducer;

- providing technical to the of ntrolle and fixing colorimetric changes in the primary chemical Converter;

- reduced overall dimensions and weight of the device.

- increase functionality.

The claimed technical result is achieved due to the fact that the device for the determination of hazardous substances in the air contains a booster flow of primary air and the chemical Converter, the pump flow includes: a control unit that provides the setting parameters of sampled air, operation and control device; vozduhoprovodyaschih path for transporting air stream; coupled with a control unit of an air pump for pumping air through vozduhoprovodyaschih tract; an Autonomous power source, and the primary chemical transducer attached to vozduhoprovodyaschih tract. The device contains sensors, flow and temperature of the pumped air, placed in vozduhoprovodyaschih tract, as well as sensors, atmospheric pressure and relative humidity pumped air located outside vozduhoprovodyaschih tract, and the control unit provides a means of displaying information; at least one control button and the electronic circuit that includes: fixation of the sensor data, the determination of air density, regulation of the volume flow pumped air, the adjustment of the time of sampling air, analog-to-digit is the first conversion of the received and transmitted data.

It is preferable that the control unit contains an electronic circuit for regulating the volumetric flow of the pumped air by changing the voltage supplied to the motor of the air pump by the method of pulse-width modulation.

In some cases, performing communication between the control unit and the air pump can be accomplished through a wired or wireless connection.

In some cases, the execution control unit may contain additional individual power source for wireless communication.

Preferably, vozduhoprovodyaschih tract, air pump, an Autonomous power supply, sensors, flow and temperature of the air stream were placed in the enclosure, and a means of information display, control buttons, sensors, atmospheric pressure and relative humidity were placed on the control panel, installed on the body.

In some cases, run the tool information display can be made in the form of liquid, preferably touch, display, and/or at least one led.

Preferably, the device additionally contains associated with the control unit, the unit reading data from the primary chemical of the Converter.

In otdelnikyh execution unit to read information from the primary chemical of the Converter can be designed as a video camera or thermal imager.

In some cases, the execution unit reads the information from the primary chemical transducer can be placed on the control panel that is installed or on the device, or remotely.

In some cases, the execution unit reads the information from the primary chemical of the Converter can be connected with the control unit through a wired or wireless connection.

Preferably, the device additionally contains a device for hermetic join the primary chemical transducer to vozduhoprovodyaschih path.

Preferably, the device for hermetic joining of the primary Converter to vozduhoprovodyaschih tract included: placed on the body of the fitting with external thread at its upper part for screwing the clamping nut; nut presser; placed inside the nozzle seal sleeve with a hole, a mechanical filter, a protective foam insert.

Preferably, the opening in the sealing sleeve was made cone.

Preferably, the device additionally contains a nozzle to work in smoky conditions or with loose soil.

Preferably, the housing additionally contains a handle connected to the housing through the base.

Before occhialino, to handle was made hollow, and an Autonomous power supply was placed in the inner cavity of the handle.

Preferably, the device additionally contains a shutoff valve located inside fixed to the body metal case with protective mesh, paired with access vozduhoprovodyaschih tract.

In some cases run as a primary Converter can be used indicator tube, or pH paper, or a flat element or indicator tape, or impactor, or sorption tube.

Preferably, the device additionally contains fixed to the body unit training indicator tubes to work, including: a device for nadpisywania ends of the flat tubes, and the hole for breaking nadelennyh ends and a device for Scrivania vials.

Preferably, the device additionally contains fixed to the body holder for cassettes with indicator tubes.

Preferably, the device additionally contains performed on the body of the electrical connector for connection to an external power source.

Preferably, the device additionally contains a loop for fastening the strap of the device.

Preferably, as a stand-alone what about the power source was used lithium battery.

The presence of flow sensors temperature of pumped air, placed in vozduhoprovodyaschih tract, as well as sensors, atmospheric pressure and relative humidity pumped air located outside vozduhoprovodyaschih tract, and a control unit containing an electronic circuit, which provides: the fixation of the sensor data, the determination of air density, regulation of the volume flow pumped air, the adjustment of the time of sampling air, analog-to-digital conversion of received and transmitted data allows us to control the pumped volume of air, the errors of the sampled air volume and to generate signals for changing consumption; to regulate the voltage to the electric motor of the air pump; supply full power of the device; the transfer device is in sleep or hibernation mode; generate optimal duty cycle of the voltage applied to the motor of the air pump, and a switching circuit device using an external power supply 16V, 18V, 12V. The presence control unit data display allows you to visualize the parameters of sampled air volume flow of air, atmospheric pressure, temperature and humidity) and mode of operation of the device, the fixation state (state of charge) of the battery b is tarei, and the presence of the control buttons simplifies the operator's work.

The presence of unit information readout is made in the form of a video camera, makes it possible to fix the settings and square calorimetric changes on the primary chemical Converter, and in the form of a thermal - fixing parameters of temperature changes in the primary chemical transducer in the infrared range to control events sorption processes. The presence of the camera also allows you to visualize the stage of operation of the device, to efficiently manage the process.

The control unit communicates with the unit reading data from the primary chemical transducer and processing the data stream with video and/or thermal imaging cameras on the intensity and area of color and/or temperature transitions that occur in the primary chemical transducer from exposure to harmful substances. The processing unit in the numerical values of concentrations of harmful substances in the air to improve the accuracy of reading data from the primary chemical Converter and eliminates operator errors subjective evaluation of color transitions. The presence of a wired or wireless connection between the control units and reading information, sensors and engine air pump; use the ie different types of primary chemical converters - indicator tube, or indicator paper or a flat element or indicator tape, or impactor, or sorption tube; nozzles for work in smoky conditions or with loose soil extend the functionality of the device. The availability of devices for the hermetic joining of the primary Converter to vozduhoprovodyaschih tract, including: placed on the body of the fitting with external thread at its upper part for screwing the clamping nut; nut presser; placed inside the fitting: rubber bushing with a hole, preferably conical; the mechanical filter cleaning; protective foam inserts can reduce non-productive time lost in preparing the device for operation, allowing accurate placement of the transducer and integrity to join the primary chemical transducer, to prevent the entry into the unit solid particles, such as glass fragments. The integrated handle enables the operator to hold the device in his hand, and the presence of a base, whereby the handle is connected with the body, gives stability when installed on a horizontal surface. The presence of the shut-off valve associated with the outlet of the air path, provides its remotedocument, and the presence of safety nets except for the AET ingress of foreign particles and moisture inside the air tract. The availability of devices for the preparation of indicator tubes, comprising: a channel for nadpisywania ends of the flat tubes; a device for breaking nadelennyh ends; a device for opening ampoules. The availability of devices for fastening tapes with indicator tubes with flexible clamping strap for secure fastening tapes allows you to optimize the process of preparing the device for use, and reduce waste. The presence on the housing of the electrical connector (socket) for connection to an external power supply allows the use of an external power source and to effect recharging of the battery. The presence on the body of the loop for belt fastening makes it easy transportation.

Comparative analysis of the claimed invention with the prototype shows that in all cases the performance of the proposed device is different from the known closest in technical essence of decision:

- presence sensors for flow, temperature, atmospheric pressure and relative humidity of air pumped through;

the execution flow sensors and temperature of the pumped air, placed in vozduhoprovodyaschih tract;

- performing sensors, atmospheric pressure and relative humidity pumped air located outside vozduhoprovodyaschih Proc. of the act;

- execution control unit, comprising: a vehicle information display; at least one control button and the electronic circuit that includes: fixation of the sensor data, the determination of air density, regulation of the volume flow pumped air, the adjustment of the time of sampling air, analog-to-digital conversion of received and transmitted data.

In some cases, perform the claimed technical solution is different from the known, the closest technical solution:

- implementation of an electronic circuit for regulating the volumetric flow of the pumped air by changing the voltage supplied to the motor of the air pump by the method of pulse-width modulation;

- run relationships between the control unit and the air pump through a wired or wireless;

- execution control unit containing an additional source of Autonomous power supply for wireless communication;

- implementation of an electronic circuit, vozduhoprovodyaschih tract, air pump, a standalone power source, sensors, flow and temperature of the air flow are accommodated in the housing, and means for information display, control buttons, sensors, atmospheric pressure and relative humidity without the ha - placed on the control panel, installed on the body;

- perform information display means in the form of a liquid, preferably touch, display, and/or at least one led;

- the presence of a block reading data from the primary chemical transducer;

the execution unit to read information from the primary chemical transducer in the form of video and/or thermal imaging cameras;

the execution unit to read information from the primary chemical transducer placed on the control panel that is installed either on the device or remotely;

the execution unit to read information from the primary chemical transducer associated with the control unit through a wired or wireless;

- have accessories for a tight join the primary chemical transducer to vozduhoprovodyaschih tract;

- executing device for hermetic joining of the primary Converter to vozduhoprovodyaschih tract including: placed on the body of the fitting with external thread at its upper part for screwing the clamping nut; nut presser; placed inside the fitting: o-sleeve with a hole, preferably conical; the mechanical filter protective foam inserts;

the presence of a Frother to work in smoky conditions or loose soil;

the presence of a handle connected to the housing through the base;

- performing a hollow handle;

- placing a standalone power source in the inner cavity of the handle;

the presence of a shut-off valve located inside fixed to the body metal case with protective mesh, paired with access vozduhoprovodyaschih tract;

- fixed on the chassis preparation unit indicator tubes to work, including: a device for nadpisywania ends of the flat tubes, and the hole for breaking nadelennyh ends and a device for Scrivania vials;

- fixed to the body of the holder for cassettes with indicator tubes;

- presence on the housing of the electrical connector for connection to an external power source;

- the presence of loops for fastening the strap of the device.

Preferred option the proposed technical solution is illustrated by the block diagram shown in Fig. 1.

Device for the determination of hazardous substances in the air contains a booster air flow 1, the primary chemical Converter 2. Booster air flow 1 includes: a control unit 3; vozduhoprovodyaschih tract 4 for transporting the airbag is the first thread; associated with the control unit 3 air pump 5 with an electric motor to circulate air through vozduhoprovodyaschih tract 4; Autonomous power supply 7. The primary chemical Converter 2, which may or indicator tube, or pH paper, or a flat element or indicator tape, or impactor, or sorption tube attached to vozduhoprovodyaschih tract 4. Booster air flow includes a flow sensor 8, the temperature sensor 9, is placed in vozduhoprovodyaschih tract 4, as well as an atmospheric pressure sensor 10 and the sensor relative humidity of air pumped through 11 located outside vozduhoprovodyaschih tract 4. The control unit 3 includes a vehicle information display 12, made in the form of liquid, preferably touch, display, and/or at least one led; at least one control button 13 on the control panel 15 and an electronic circuit (not shown), which provides: the task of the parameters of sampled air, operation and control device, the fixation of the sensor data, the determination of air density, regulation of the volume flow pumped air (including by changing the voltage supplied to the motor of the air pump by the method of pulse-width modulation), the adjustment time is Yeni sampling of air, analog-to-digital conversion of received and transmitted data. Sensors 8-11 are connected with the control unit 3. Communication between the control unit 3, the air pump 5 and the sensors 8-11 performed through a wired (e.g., cable) or wireless (e.g. radio channels in different frequency ranges and types of encoding - WI-FI, Bluetooth and other) connections (not shown). For wireless communication, the control unit 3 may contain additional individual power source (not shown). The device includes a housing 14 which contains an electronic circuit (not shown), vozduhoprovodyaschih tract 4, air pump with an electric motor 5, a standalone power source 7, the flow sensors 8 and temperature of the air stream 9. On the housing 14 has a control unit 3. As additional equipment, the device comprises a block 16 reading information about changes in primary chemical Converter 2 connected to the control unit 3 via a wired or wireless connection. In various embodiments, the execution unit 16 reads the information may be in the form of video and/or thermal imaging camera on the device, or remotely from a device (not shown). For the hermetic join the primary chemical transducer 2 to vazduhoplovaca the th path 4, the device comprises a device 6, includes: posted by on the housing 14 of the fitting 17 with an external thread for screwing the clamping nut 18. Inside the fitting 17 posted by: sealing (e.g., rubber) bushing with a hole, preferably conical, mechanical filter, a protective foam inserts (not shown). To work in smoky conditions or with loose soil, the device comprises a nozzle 19 (for example, for fastening smoke filters). The device comprises a self-contained power source 7, which can be used lithium battery, placed in the hollow handle 20 connected to the housing 14 through the base 21. Output vozduhoprovodyaschih tract 4 has a shutoff valve 22 placed inside fixed to the body 14 of the metal case with protective mesh, paired with the output (not shown). The device contains fixed to the body 14 preparation unit indicator tubes to 23, comprising a device 24 for nadpisywania ends of the flat tubes, a hole 25 for breaking nadelennyh ends and a device 26 for Scrivania vials. The device has attached to the housing holder 27 for cassettes with indicator tubes and loops 29 for fastening the strap of the device. The housing 14 is the electrical connector 28 for connection to the externally is the power source.

For example, the use of the indicator tube as the primary chemical of the Converter 2, the device operates as follows.

The device includes using the control buttons 13. After passing the self test on the vehicle information display 12 displays information about the readiness of the device to work - led lights up or alphanumeric display a corresponding note appears and reflects the state of the battery 7 in the form of a percentage of the charge. From the cassette in the holder 27, take out the primary chemical Converter 2, which used the indicator tube (hereinafter indicator tube 2), open it using the devices 24, 25, 26. To perform this operation, the cylindrical end of the indicator tube 2 set perpendicular to the channel 24 to nadpisywania ends of the flat tubes and perform the rotational movement of the housing of the indicator tube 2 around its vertical axis, at the end of the glass indicator tube 2 is formed a ring nadela. Nadelennyi end is inserted into the hole 25 and breaks off the movement on a break. To perform the operation wetting of the filler exposed from both ends of the indicator tube is placed in the fixture 26 for opening vials so that the pin ampeliscidae got inside to the pus indicator tube 2 and a light pressing break the ampoule. Arising from the ampoule indicator solution must be fully moisten the reaction filler indicator tube 2. Prepared to work flat tube 2 attached to Fi re the fixture 6 air duct 4. When working in smoke-filled conditions on the external threads of the retainer nut 18 fixtures 6 cheat suppressant nozzle 19 in the clamp which is fixed smoke filter (not shown). When determining the contamination of the soil inside the nozzle 19 is placed a cap with a test soil (not shown), which serves smoke filter to prevent sifting of soil samples during analysis, and fix the clamp head. Using the control buttons 13 on the control panel 15 includes a sample of air. The operation of the air pump 5 is automatically controlled by the control unit 3 in accordance with the selected mode, regardless of the internal resistance of the indicator tube. Information about the current device status is reflected on the vehicle information display 12. It is either the constant glow of the led or the display of the percentage of selected air on the alphanumeric display. After selection of a given air volume control led starts to operate in a flashing mode and the pump 5 is turned off. When picking device is TBA unit reading information 16 in the form of a video camera or imager determining the concentration readings of the indicator tube 2 is carried out automatically. In a simple configuration with no video indicator tube 2 is cut off from Fi re device 6 and the measurement of the concentration of harmful substances visually length changed the original color of the layer of filler indicator tube 2. In the case of discharge of the battery 7, the operation of the device can be supplied from an external power source, by connecting the power cable to the electrical connector 28.

Similarly implemented using other types of primary chemical converters. The operator connects to Fi re the fixture 6 required primary Converter 2, selects using the control buttons 13 programme of work of the device with the corresponding type of the initial chemical transducer 2 and presses the start button of the pump motor 5. In the device menu of the recorded information, the array of primary chemical converters, which is associated with the parameters recorded in the memory of the electronic control unit 3 is required to regulate the amount of airflow rates depending on the data of the measuring sensors 8, 9, 10, 11, and conversion of colorimetric changes fixed by the block reading 16 in units of concentration of harmful substances. In the process of measuring the concentration of harmful substances info is information about flow-pressure characteristics of the air, the temperature, pressure and humidity, is supplied to the control unit 3 from sensors air flow 8, the temperature of 9 and an atmospheric pressure 10. By incoming data processor of the electronic circuit is determined by the specific program adjustments and regulation. In the process of sampling of air, measured parameters temperature, pressure and humidity, are used by the unit 3 for determining the density of sampled air and bring it to normal climatic conditions. Regulation of the volume flow is carried out by the control unit 3 by changing the voltage supplied to the electric motor of the pump 5 by the method of pulse-width modulation. The conversion of colorimetric changes in the primary chemical transducer fixed by the block reading 16 (camera or imager), in units of concentration of harmful substances carried by the block 3 after completion of the sampling of air. The obtained values of concentrations of harmful substances are adjusted with regard to the readings of the humidity sensor 11 and are normal climatic conditions depending on the current values of the temperature sensors 9 and the pressure 10. The design of the pump allows the selection of volumes of air with an absolute error of no more than 3-10% in the temperature range -30°C÷+50°C atmospheric davlenie-770 mm RT.article and relative humidity 5-80%.

The LIST of STRUCTURAL ELEMENTS

1 - booster air flow

2 - the primary chemical Converter

3 is a control block

4 - vozduhoprovodyaschih path for transporting air flow

5 - motor to circulate air through vozduhoprovodyaschih tract

6 - device for sealing to join the primary chemical transducer (Fi re device)

7 is a self - contained power source

8 is a flow sensor

9 - temperature sensor

10 is an atmospheric pressure sensor

11 - relative humidity sensor pumped air

12 is a means of displaying information

13 - button control

14 - housing

15 control panel

16 - unit reading information about the changes in the primary chemical Converter

17 - fitting

18 - clamping nut

19 attachment for working in smoky conditions or with loose soil

20 is a hollow handle

21 - base

22 - shutoff valve,

23 - preparation unit indicator tubes to work

24 - device for nadpisywania ends of the flat tubes

25 - hole for breaking nadelennyh all

26 is a device for Scrivania vials

27 - holder for cassettes with indicator tubes

28 - electric connector is for connection to an external power supply

29 - loops for fastening the strap of the device

1. Device for the determination of hazardous substances in the air, containing the pump flow and the primary chemical Converter, the pump flow includes: a control unit that provides the setting parameters of sampled air, operation and control device; vozduhoprovodyaschih path for transporting air stream; coupled with the control unit: air pump for pumping air through vozduhoprovodyaschih tract; an Autonomous power source, and the primary chemical transducer attached to vozduhoprovodyaschih tract, characterized in that it contains connected with the control unit, flow sensors, temperature, atmospheric pressure and relative humidity of air pumped through, when this flow sensors and temperature of the pumped air is placed in vozduhoprovodyaschih tract, and sensors barometric pressure and relative humidity of air pumped through hosted outside vozduhoprovodyaschih tract; the control unit includes a means of displaying information; at least one control button and the electronic circuit that includes: fixation of the sensor data, the determination of air density, regulation of the volume flow pumped air, the adjustment time uberpro air, analog-to-digital conversion of received and transmitted data.

2. The device under item 1, characterized in that the control unit contains an electronic circuit for regulating the volumetric flow of the pumped air by changing the voltage supplied to the motor of the air pump by the method of pulse-width modulation.

3. The device under item 1, characterized in that the connection between the control unit and the air pump is made through a wired or wireless connection.

4. The device under item 1, characterized in that the control unit contains an additional source of Autonomous power supply for wireless communication.

5. The device under item 1, characterized in that vozduhoprovodyaschih tract, air pump, an Autonomous power supply, sensors, flow and temperature of the air flow are accommodated in the housing, and the means of information display, control buttons, sensors, atmospheric pressure and relative humidity are placed on the control panel, installed on the body.

6. The device under item 1, characterized in that the means of displaying information made in the form of liquid, preferably touch, display, and/or at least one led.

7. The device under item 1, characterized in that it further comprises associated with the block of the Board unit reading data from the primary chemical of the Converter.

8. The device according to p. 7, characterized in that the unit reading data from the primary chemical of the Converter is implemented in the form of video and/or thermal imaging camera.

9. The device according to p. 7, characterized in that the unit reading data from the primary chemical transducer placed on the control panel installed on the device, or remotely from the device.

10. The device according to p. 7, characterized in that the unit reading data from the primary chemical of the Converter is connected with the control unit through a wired or wireless connection.

11. The device under item 1, characterized in that it further comprises a device for hermetic join the primary chemical transducer to vozduhoprovodyaschih path.

12. The device according to p. 11, characterized in that the device for hermetic joining of the primary Converter to vozduhoprovodyaschih tract includes: placed on the body of the fitting with external thread at its upper part for screwing the clamping nut; nut presser; placed inside the fitting: o-sleeve with a hole, a mechanical filter, a protective foam insert.

13. The device according to p. 12, characterized in that the opening in the sealing sleeve is made conical.

14. The device according to p. 1, featuring the be fact, which further comprises a nozzle for work in smoky conditions or with loose soil.

15. The device under item 5, wherein the housing further comprises a handle connected to the housing through the base.

16. The device according to p. 15, characterized in that the handle is made hollow, and an Autonomous power supply is placed in the inner cavity of the handle.

17. The device under item 5, characterized in that it further comprises a shutoff valve located inside fixed to the body metal case with protective mesh, paired with access vozduhoprovodyaschih tract.

18. The device under item 1, characterized in that as the primary transducer used indicator tube, or pH paper, or a flat element or indicator tape, or impactor, or sorption tube.

19. The device under item 5, characterized in that it further comprises fixed to the body unit training indicator tubes to work, including a device for nadpisywania ends of the flat tubes, and the hole for breaking nadelennyh ends and a device for Scrivania vials.

20. The device under item 5, characterized in that it further comprises fixed to the body holder for cassettes with indicator tubes.

21. The device under item 5, characterized in that the content is t performed on the body of the electrical connector for connection to an external power source.

22. Device according to any one of paragraphs.1-21, characterized in that it further comprises a loop for fastening the strap of the device.

23. Device according to any one of paragraphs.1-21, characterized in that as a standalone power source used lithium battery.

24. The device under item 1, characterized in that the control unit contains an electronic circuit for regulating the volumetric flow of the pumped air by changing the voltage supplied to the motor of the air pump by the method of pulse-width modulation; the connection between the control unit and the air pump is made through a wired or wireless communication; a control unit contains an additional source of Autonomous power supply for wireless communication; vozduhoprovodyaschih tract, air pump, an Autonomous power supply, sensors, flow and temperature of the air flow are accommodated in the housing, and a means of displaying information, made in the form of liquid, preferably touch, display, and/or at least one led; control buttons, sensors, atmospheric pressure and relative humidity are placed on the control panel mounted on the housing; the device further comprises: a) associated with the control unit through a wired Il the wireless communication unit to read information from the primary chemical transducer, made in the form of cameras or thermal imaging camera, placed on the control panel that is installed on the housing of the device or remotely from it; b) placed on the device device for hermetic join the primary chemical transducer to vozduhoprovodyaschih tract, comprising: a fitting with external thread at its upper part for screwing the clamping nut; nut presser; placed inside the nozzle seal sleeve with a conical bore, a mechanical filter, a protective foam liner; C) a nozzle for work in smoky conditions or loose soil; g) connected to the housing by means of the handle, preferably hollow, in the inner cavity of which is placed an Autonomous power supply; d) shut-off valve located inside fixed to the body metal case with protective mesh, paired with access vozduhoprovodyaschih tract; (e) fixed on the housing of the device processing block indicator tubes to work, including a device for nadpisywania ends of the flat tubes, and the hole for breaking nadelennyh ends and a device for Scrivania vials; W) is fixed to the device holder for cassettes with indicator tubes; and) placed on the device connector for the connecting to an external power source; K) hinges on the device for fastening the strap; at the same time as the primary Converter used indicator tube, or pH paper, or a flat element or indicator tape, or impactor, or sorption tube, as a standalone power source used lithium battery.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to analytical chemistry, namely to photometric determination of small concentrations of iron (III) in solutions of pure salts. The method includes conversion of iron (III) in a complex compound with an organic reagent and a surface-active substance in a mildly acidic medium by heating the above on water bath with following photometry of the obtained solution, and to a solution of iron (III) with pH 3.9-.5.2 added is 50-fold quantity of an organic reagent, represented by xylenol orange, 1.8-2.2 ml of a surface-active substance in the form of a 2% solution of ETHAL LA-7, and water to 10 ml of the volume with the following heating on water bath at a temperature of 60-80°C for 15 min and addition of 1 ml of acetone into the obtained solution.

EFFECT: invention makes it possible to increase the analysis sensitivity.

1 ex

FIELD: instrumentation.

SUBSTANCE: invention relates to the field of gases identification and refers to a spectral analysis system for gases identification using a treated tape. The system includes a treated tape, an adjustable colour source, a photodiode, a colour identification sensor and a microprocessor. The adjustable colour source emits radiation in the direction of the treated tape with multiple varied wavelengths. The photodiode measures the radiation reflected from the treated tape. The microprocessor analyses the measurement results and, proceeding from the colour identified and the colour spot intensity, identifies the type and concentration of the gas the treated tape has been exposed to. Additionally, the microprocessor, with the help of the colour identification sensor, controls the radiation wavelength of the adjustable colour source and, whenever required, corrects the colour source radiation.

EFFECT: technical effect consists in increased sensitivity and ensuring the possibility of different type gases detection.

13 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: at first sample of tested oil product with fixed volume is passed through water-coagulating agent placed between turns of a flat spiral mounted in a cavity of the element having shape of a truncated cone. When the sample is passed along the spiral the time for coagulation of free water microdrops in the sample is extended. Then the sample of the tested oil product is passed through a filter membrane with a deposited layer of water-sensitive chemical agent. At that by means of the hollow element having shape of a truncated cone this sample is localised at the surface of this water-sensitive chemical agent and water availability or concentration is evaluated by its colour changing. Additionally water concentration in the sample of the tested oil product is evaluated against decrease of the sample fixed volume before the water-sensitive chemical agent changes its colour.

EFFECT: improved accuracy of the analysis.

1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to field of analytical chemistry, namely to photocolorimetric method of analysis, and can be used for determination of iron (II) content in extract of spruce needles, containing iron (II) in very low concentration. Method includes its transfer into complex compound with organic reagent, with addition of 150-200-fold amount of organic reagent to solution of iron (II) with pH 3, as reagent used is Congo red, 0.2-0.4 ml solution of surface-active substance in form of 0.2% solution of 6-aminocapronic acid, and water to 10 ml with further heating on water bath at temperature 80-98°C for 10-15 min.

EFFECT: increased analysis sensitivity.

1 ex

FIELD: chemistry.

SUBSTANCE: invention describes a method of determining aluminium (III), which involves preparing a sorbent, an aluminium (III) solution, extracting aluminium (III) from the solution using the sorbent and conversion thereof into a complex on the surface of the sorbent, separating the sorbent from the solution, measuring luminescent intensity of the surface aluminium (III) complex and determining content of aluminium from a calibration curve. The sorbent used is silica gel which is successively modified with polyhexamethylene guanidine and 7-iodo-8-hydroxyquinoline-5-sulphonic acid, and luminescent intensity is measured at 495 nm.

EFFECT: low threshold of detecting aluminium, wider range of determined content, low consumption of the organic complexing agent.

4 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention can be used to determine content of iron (II) in solutions of pure salts containing iron (II) in very low concentrations. The method involves converting iron (III) into a complex compound with an organic reagent in a weakly acidic medium. The iron (II) solution with pH 2-5 is mixed with 200-300 times the amount of the organic reagent which is Congo red, 0.2-0.4 ml surfactant solution in form of a 0.2% solution of monoalkyphenyl ester of polyethylene glycol based on a polymer distillate and 10 ml water, followed by heating on a water bath at temperature of 80-98°C for 10-15 minutes.

EFFECT: high sensitivity of analysis.

5 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: method of determining tin (IV) in an aqueous solution involves extraction of tin (IV) ions. Extraction is carried out by adding antipyrine, sulphosalicylic acid and calcium chloride with concentration of 0.60, 0.35 and 2 mol/l, respectively, to the solution. After phase separation, morin solution is added to the extract to form a fluorescent tin and morin complex, followed by measurement of fluorescence of the obtained solution using liquid analyser Fluorat2-3M to determine concentration of tin (IV).

EFFECT: quantitative detection of tin ions and simple analysis.

1 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: invention describes a method for quantitative determination of organic compounds in binary mixtures by measuring thermal effects of polymorphic transitions occurring during decomposition of products of saturating tert-butylcalix[6]arene with compounds of a binary mixture selected from: cyclohexane, chloroform, dimethyl sulphoxide, pyridine and from: benzene, tetrachloromethane, acetonitrile, acetone, dichloromethane, toluene. Quantitative analysis of content of organic compounds in binary mixtures is carried out based on a calibration curve of thermal effects of processes of decomposition of products of saturating tert-butylcalix[6]arene with said mixtures versus content of components in the mixture.

EFFECT: method enables to conduct quantitative analysis of binary mixtures of a known composition or mixtures where the component which does not induce phase transition of calixarene is known, wherein the analysed components can have similar physical and chemical properties.

42 ex, 4 tbl, 3 dwg

FIELD: chemistry.

SUBSTANCE: method involves using sulphonazo as a colour reagent and photometering, wherein a sulphonazo ion-associate with an azo dye is formed in the solution, which is then concentrated on a foamed polyurethane sorbent, followed by photometering of the ion-associate directly on the solid phase at pH=8 and wavelength 538 nm.

EFFECT: high sensitivity and selectivity of analysis.

1 ex, 2 tbl, 3 dwg

FIELD: chemistry.

SUBSTANCE: method of determining chromium (VI) using a polymethacrylate matrix involves preparing a chromium (VI) solution, extracting chromium (VI) using a membrane with an immobilised reagent, subsequent separation thereof from the solution, measuring the analytical signal and estimating content of chromium (VI). The membrane used is a polymethacrylate matrix with immobilised diphenylcarbazide. The analytical signal used is light absorption at 545 nm, colour coordinates or visual estimate of colour intensity of the optical membrane. Content of chromium (VI) is estimated using a calibration curve or by a visual test technique.

EFFECT: simple, faster and safer analysis.

4 ex, 1 tbl, 1 dwg

FIELD: analytical methods.

SUBSTANCE: group of inventions is directed on detecting and quantitatively determining hydrogen radicals present in water or in aqueous solution and is characterized by adding sodium 3,5-dibromo-4-nitrosobenzenesulfonate to sample to detect hydrogen radicals from coloration appearing as a result of their absorption characteristics, and additionally characterized by blowing gaseous hydrogen through 1,1-diphenyl-2-picrylhydrazide solution absorbing near 517 nm and sodium 3,5-dibromo-4-nitrosobenzenesulfonate solution at constant velocity in presence of platinum black in order to quantitatively evaluate hydrogen radical concentration using calibration curve based on correlation between coefficient of absorption near 450 nm for azo compound of sodium 3,5-dibromo-4-nitrosobenzenesulfonate and concentration of hydrogen radicals appeared.

EFFECT: increased determination accuracy and enabled analysis of hydrogen radicals in various media.

6 cl, 15 dwg, 1 tbl, 5 ex

FIELD: analytical methods in environmental monitoring.

SUBSTANCE: method comprises: sampling, acidifying samples with HCl/H2SO4 mixture, adding Ce(SO4)2 as oxidant and removing its excess with reducing agent NH2OH·HCl, adding rhodamine C as organic reagent, extracting resulting complex, separating organic phase from aqueous phase, and measuring optical density. Extraction is performed with carbon tetrachloride/methyl isobutyl ketone mixture at 5:1 volume ratio and extractant-to-sample volume ratio 1:1 under dynamic conditions by way of washing away complex with extractant. Content of antimony is judged of from difference of optical densities of extractant and mixture.

EFFECT: lowered measurement threshold to values comparable with allowable limits, increased reliability, reduced analysis time, and automated analytical procedure.

3 cl, 1 dwg, 3 tbl, 3 ex

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to preparing analytical reagents eliciting selectivity and high sensitivity with respect to transient metal cations. Method involves interaction of 2-hydroxythiobenzoyl hydrazone with aromatic aldehydes that results to synthesis of 2-(2'-hydroxyphenyl)-5-(R'-phenyl)-1,3,4-thiadiazolines-2 that have been tested as analytical reagents with metal cation salts of s-, p- and d-elements. Obtained results of investigations have been applied for analysis of medicinal agents containing transient metal cations. Invention provides expanding assortment of analytical reagents used for detection of metal cations of s-, p- and d-elements that can be used in analytical, pharmaceutical and chemical-toxicological practice.

EFFECT: valuable properties of reagents.

1 cl, 2 tbl, 3 ex

FIELD: pharmaceutical chemistry.

SUBSTANCE: the present innovation deals with identifying isoniazide, pyridine derivative, applied to control the quality of production manufactured by pharmaceutical enterprises and prepared by drug stores. One should detect by treating the sample under investigation with freshly prepared 10%-hydroxylamine hydrochloride alkaline solution at obtaining the color. The method creates minimal duration for detection.

EFFECT: higher sensitivity and specificity of the method.

1 ex, 2 tbl

FIELD: analytic chemistry (indicating compositions).

SUBSTANCE: claimed composition contains (mass %): sorbent (anionite, modified with organic reagent) 0.4; hydrochloric acid 0.0011-0.0015; and balance: water. Composition of present invention is useful in determination of Mo(VI) content in natural water and wastewater.

EFFECT: improved sensitivity, increased analysis velocity and decreased effort.

3 tbl

FIELD: analytical chemistry of elements.

SUBSTANCE: the invention is pertaining to the field of analytical chemistry of elements, in particular, to methods of detection of silver availability, that may be used at detection of silver availability in the natural waters and technological solutions. The method of detection of silver availability provides for preparation of a silver solution (1), its transformation into a complex compound and measurement of the luminescent emission intensity. Silver is separated from solutions using a silica gel chemically modified with the help of mercaptogroups and intensity of the silver complex compound luminescent emission (1) is measured with the help of mercaptogroups on the surface of silica gel at 77К at ultraviolet irradiation light. The technical result is simplification of the technological process, decrease of a relative limit of detection, extension of the range of defined concentrations.

EFFECT: the invention ensures simplification of the technological process, decrease of a relative limit of detection, extension of the range of defined concentrations.

3 ex

FIELD: analytical methods.

SUBSTANCE: indicator composition, which is used two-step analytical procedure, contains 0.6% anionite AN-31 in sulfate form (as sorbent), 0.05% 4-(2-pyridylazo)resorcinol (reagent), 0.098-0.1% sulfuric acid as pH-creating reagent in the first step, which is neutralized in the second step with excess (0.0035-0.004%) aqueous ammonia to pH 9. Method can be, in particular, used for assaying waste waters and industrial solutions.

EFFECT: enabled joint determination of the two ions, improved selectivity of analysis, and accelerated analytical procedure.

3 tbl

FIELD: analytical chemistry.

SUBSTANCE: method can be used for determining content of bismuth in copper-based alloys. Bismuth solution (III) is prepared, transferred into complex compound and diffuse reflection factor is measured. Bismuth is selected due to transferring it into complex compound from 0,5-3 M solution of hydrochloric acid by means of sorbent - silica, chemically modified N-allyl-N'-propylthiocarbamide. Diffuse reflection factor of bismuth (iii) complex is measured when taking N-allyl-N'-propylthiocarbamide on the surface of silica.

EFFECT: simplified procedure of measurement; widened range of concentrations to me measured.

4 ex, 1 tbl

FIELD: analytical chemistry, indicating composition for gold (iii) assay in aqueous solutions, in particular in waste water and processing solutions.

SUBSTANCE: claimed composition contains (mass %): anionite as sorbent 0.8; hydrochloric acid 5.8; tin(II) chloride 0.8 and balance: water. Method of present invention makes it possible to detect Au(III) in acidic solutions (pH<2).

EFFECT: method with improved sensitivity and selectivity.

3 tbl

FIELD: analytical methods.

SUBSTANCE: in indicator composition for determining manganese(II), in particular, in waste waters and production solutions, containing 0.6% of sorbent, 0.05% of reagent, medium pH adjusting substance, and water, said sorbent is sulfate-form anionite (AN-31), said reagent is 4-(2-pyridylazo)resorcinol, and pH of medium is adjusted with 0.0035-0.004% of ammonia. Concentration of Mn2+ ions is measured spectrophotometrically in presence of above-defined indicator.

EFFECT: increased determination selectivity and accelerated analytical procedure.

3 tbl

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