Specimens preconcentrator

FIELD: process engineering.

SUBSTANCE: proposed invention can be used for absorption and desorption of gas sample. This preconcentrator comprises nanocomplexes of metals with carbon nanotubes. Note here that metal in said nanocomplexes with carbon nanotubes represents one or more metals selected from the group consisting of cobalt, copper, nickel, titanium, silver, iron, tungsten and their aqueous salts or hydrates. This preconcentrator can comprises unit of specimens with said nanocomplexes and gas sample feed hole, dried gas feed source and gas analyser system connected with said preconcentrator. Besides, it can comprise channel switchover valve for selective gas sample feed, dried gas feed source and gas analyser system with sample concentration unit and gas absorption and desorption from sample control unit.

EFFECT: higher efficiency of concentration of gases.

13 cl, 8 dwg

 

The technical field to which the invention relates

The invention relates to pre-concentrators samples, which are used to absorb and decarbonate the gas sample, and, more specifically, to pre-concentrators samples containing absorbent, which consists of nanocomplexes metals with carbon nanotubes.

The level of technology

Gas sensors are widely used in such applications as safety in the production, control, environment, food industry, medical care and other areas. In the prior art used mainly types of gas sensors, which detect different gases, but in recent years developed technology "electronic nose", in which the gas sensors form a matrix configuration that responds to a number of smells and aromas.

In order to analyze samples of gases, such as volatile organic compounds (VOCS)using the above-mentioned gas-analyzing system, such as a gas sensor, electronic nose and gas chromatography, necessarily requires the preconcentrator samples, which is able to absorb and decarbonate samples of gases.

As one example, the pre-concentrate the RA samples Korean patent publication No. 10-2005-0059364 describes the preconcentrator for absorption and desorption of gases from the absorbent, which consists of carbon nanotubes, and a method for its manufacture.

More specifically, the absorbent described in Korean patent publication No. 10-2005-0059364, made directly growing carbon nanotubes on the electrodes. However, problems of this preconcentrator is that it is impossible to measure the speed of gas flow due to a pressure drop caused by compact growth of carbon nanotubes, and it is difficult to concentrate a variety of mixed gases to a suitable concentration, because of the very low density growth leads to low absorption capacity of carbon nanotubes.

As the next example preconcentrator samples Korean patent publication No. 10-2006-0061629 describes the preconcentrator samples having the ability to remove water vapor.

The preconcentrator samples described in Korean patent publication No. 10-2006-0061629 contains a unit for concentration of samples, which has the configuration similar to the most standardized type of traditional block the absorption/desorption of gas [see C. J. Lu and E. T. Zellers, Analyst, 2002, 127 so, S. 1061-1068], where the solid absorbent, for example, Tenax or Carbotrap, which is usually used because it has a lower absorption efficiency than other absorb the options but shows low affinity to water, which reduces the side effects caused by moisture, is used as the absorbent in the unit for concentration of samples, and pre-concentrator further includes a removal unit moisture, which connects the gas sensor with rear-end pre-concentrator designs.

Here the unit for concentration of samples is used to concentrate the samples and removing moisture and block the removal of moisture is used for secondary removal of moisture. To completely remove the moisture, the moisture is removed using absorbent, for example, granules of silicon dioxide, which is capable of selectively absorb the water because it consists of polar molecules.

As the next example preconcentrator samples of U.S. patent No. 7430928 describes a "Method and apparatus for concentrating vapors for analysis.

In this U.S. patent unit concentration of the samples is made by filling the interior of the porous nanostructural catalyst, which is a Nickel, absorbent, which is able to absorb volatile organic compounds, and locking nanostructural catalyst and absorbent wire mesh. Here the porous nanostructural catalyst is used to carry out efficient heat-exchange absorbent.

However, the problem of nanostructural catalyst of zakluchaetsa, because it is very difficult to form pores of the same size, absorbent, which fills the pores, uneven, and pores, which may be formed in the nanostructural catalyst, have very limited size.

Meanwhile, in addition to carbon nanotubes and porous-type polymer Tenax based on 2,6-differencia, the adsorbent of volatile organic compounds, which can be used include graphite type carbon Carbopack, carbon molecular sieve type Carbosieve, Carbopack, Carboxen, etc. However, these absorbents have limitations in the effective concentration of traces of volatile organic compounds.

The invention

Technical problem

These and other aspects of the present invention provide for the preconcentrator samples using nanocomplexes metals with carbon nanotubes as adsorbent.

Solution

The preconcentrator samples according to one exemplary variant of implementation of the present invention differs in that the insertion opening for gas samples connected with a source of supply of the dried gas and a gas analyzing system for concentration of the sample gas. Here the preconcentrator samples contains a unit for concentration of samples containing absorbent, which soteitis of nanocomplexes metals with carbon nanotubes; valve switching channels for selective connection holes for inserting samples of gas from a source of supply of the dried gas and gas-analyzing system and regulation of absorption and desorption of the gas sample from the concentration block of samples; and the multitude of channels that connect the hole to enter the sample gas, the supply of the dried gas, a gas analyzing system, the unit of concentration of the samples and the valve switching channels.

According to one exemplary variant of implementation of the present invention, the unit for concentration of samples may include a first pipe; nanocomplexes metals with carbon nanotubes, filling the first tube for absorption and desorption of the gas sample; a locking element mounted on both ends of the nanocomplexes metals with carbon nanotubes to capture nanocomplexes metals and carbon nanotubes; and a heating element for heating the first tube to decarbonate volatile organic compounds absorbed in the nanocomplexes metals with carbon nanotubes.

Each of the nanocomplexes metals and carbon nanotubes may have a size of from 10 nm to 1000 nm, and the nanocomplexes metals and carbon nanotubes may be present in an amount of from 1 mg to 1 g

The locking element includes the ü a couple of items from glass wool, each of which both ends are respectively at the edges of the nanocomplexes metals and carbon nanotubes; and a pair of grids of stainless steel, located, respectively, on the outer sides of the elements of glass wool.

The heating element may be made of Nickel-chromium (Ni-Cr) or platinum wire and may include a heating wire, surrounding the first tube.

The unit concentration of the samples can further comprise a temperature sensor for determining the temperature of the first tube and the conduit, installed inside a temperature sensor.

The preconcentrator samples according to one exemplary variant of implementation of the present invention may optionally include isothermal module to prevent condensation of the sample gas. In this case, the insulated module may contain isothermal block and insulated pipe.

Valve switching channels may consist of deleteport valves and the function of backwashing can be performed using the valve switching channels.

The preconcentrator samples according to one exemplary variant of implementation of the present invention may additionally include a pressure sensor for determining pressure of the dried gas coming from the East is cnica supply dried gas; unit moisture removal to remove the moisture present in the dried gas; control flow in order to regulate the flow rate of the dried gas; and a pump for outputting the dried gas which has passed through the unit for concentration of samples.

Useful effects of the invention

The preconcentrator samples having the above described configuration, can operate at a lower temperature desorption than traditional pre-concentrators samples, because of the rapid and effective thermal conductivity, since the pre-concentrator samples used absorbent, which consists of nanocomplexes metals with carbon nanotubes. In addition, the preconcentrator samples may be useful for the effective concentration of the samples poisonous gases such as volatile organic compounds.

In addition, since excellent thermal diffusion of nanocomplexes metals with carbon nanotubes is carried out at the stage of filing of desorbed gas sample in the gas analyzing system, the sample is desorbed volatile organic compounds can be effectively concentrated to obtain the excellent ability of decomposition.

In addition, the preconcentrator samples can be used to reduce the difference between the tempo of the atur desorption of volatile organic compounds, subject desorption, and enhance the ability of decomposition gas analyzing system, since the heating wire is made of chrome-Nickel or platinum wire to heat the unit for concentration of samples in a short period of time of 5 seconds.

In addition, the preconcentrator samples can be used to implement functions backwashing by filing desorbed volatile organic compounds in the gas analyzing system and simultaneous operation of the valve channel.

Moreover, the preconcentrator samples can be used to prevent condensation of volatile organic compounds in the drift channel and valve switching channels using isothermal module.

Brief description of drawings

Fig. 1 and 2 are diagrams illustrating the configuration of the preconcentrator samples according to one exemplary variant of implementation of the present invention. Here Fig. 1 represents the configuration preconcentrator samples at the stage of absorption of the sample, and Fig. 2 represents the configuration of a preconcentrator samples at the stage of desorption of the sample.

Fig. 3 and 4 are diagrams illustrating the configuration of the block 110 concentration sample is in accordance with one exemplary variant of implementation of the present invention. Here Fig. 3 is a view of cross-section in the longitudinal direction of the block 110 concentration samples, and Fig. 4 is the cross-sectional view taken from line IV-V, as shown in Fig. 3.

Fig. 5 is a diagram illustrating a graph and a table, including the results obtained when measuring the ability of desorption of volatile organic compounds by nanocomplexes 114 metals with carbon nanotubes, which are used as absorbent in the unit for concentration of samples 110 according to one exemplary variant of implementation of the present invention.

Fig. 6-8 are diagrams illustrating graphs and tables, including the results obtained when measuring the ability of absorption of volatile organic compounds by nanocomplexes 114 metals with carbon nanotubes, which are used as absorbent in the unit for concentration of samples 110 according to one exemplary variant of implementation of the present invention.

The preferred embodiment of the invention

Next, the preconcentrator samples according to an exemplary variants of implementation of the present invention will be described in more detail with reference to the accompanying drawings. In addition, it should be noted that the parts that perform the same or substantially the identity the s functions and activities, on the accompanying drawings are denoted by the same conditional rooms. However, for a detailed description of the present invention, it is believed that the descriptions of known components and their respective configurations according to exemplary variants of implementation of the present invention can not lead, as this can make the essence of the present invention unnecessarily confusing. Thus, it should be considered that some of the distinguishing features represented in the drawings, may be hidden or simplified for convenience and optional components present in appropriate proportions. However, you should understand what can be done and other equivalents and modifications, as it is obvious to experts in the given field of technology.

Fig. 1 and 2 are diagrams illustrating the configuration of the preconcentrator samples according to one exemplary variant of implementation of the present invention. Here Fig. 1 represents the configuration preconcentrator samples at the stage of absorption of the sample, and Fig. 2 represents the configuration of a preconcentrator samples at the stage of desorption of the sample.

In addition, Fig. 3 and 4 are diagrams illustrating the configuration of the unit for concentration of samples according to one exemplary variant implementation of the ia of the present invention. Here Fig. 3 is a view of cross-section in the longitudinal direction of the unit for concentration of samples, and Fig. 4 is the cross-sectional view taken from line IV-V, as shown in Fig. 3.

The preconcentrator 100 samples, in which the hole 200 to enter the sample gas is connected to the source 300 filing dried gas and gas-analyzing system 400 according to one exemplary variant of implementation of the present invention, includes a block 110 concentration samples, the valve 130 switching channels and multiple channels.

Hole 200 to enter the sample gas is used to supply samples of atmospheric gases in block 110 concentration sample preconcentrator 100 samples.

The source 300 of the filing of the dried gas is used to supply the dried gas such as nitrogen gas, in block 110 the concentration of the samples, and gas analyzing system 400 is used for analysis of samples, such as volatile organic compounds that are absorbed in block 110 concentration samples and desorbers from block 110 concentration samples.

Block 110 concentration of samples includes heat-resistant glass tube 112, the nanocomplexes 114 metals with carbon nanotubes, the heating wire 116, sensor 118 temperature and fixing elements 120 and 122.

Nanocomplex the 114 metals with carbon nanotubes, functioning as an absorbent, is located inside the glass tube 112 and the plug of glass wool 120 and the grid 122 stainless steel installed at both ends of the glass tube 112, respectively, to fix the nanocomplexes 114 metals with carbon nanotubes. In this case, grid 122 stainless steel on the outer sides of the elements of glass wool 120, respectively.

Glass tube 112 is a heat-resistant glass, which is physically and chemically stable at a temperature of 500°C or higher, and are made from materials that can quickly transfer enough heat to the absorbent material.

The heating wire 116 is installed on the outside of the glass tube 112, and the heating wire 116 is used to raise the temperature of the glass tube 112, where a concentrated sample, such as a volatile organic compound is desorbed from nanocomplex 114 metals with carbon nanotubes, which are filled glass tube 112.

The heating wire 116 is made of Nickel-chromium (Ni-Cr) or platinum (Pt) wire, the resistance of which varies from 5 Ω to 10 Ω to increase the temperature of the glass tube 112 to 350°C for a short period of time of 5 seconds.

The sensor 118 temperature set the Yong inside the insulating tube 124, to quickly determine the temperature change of the glass tube 112 when the temperature of the glass tube 112 is increased. In this case, the insulating tube 124 may be made of insulating materials such as capillaries for micropipettor, heat-resistant glass capillary tube or polyimides.

Meanwhile, if the block 110 concentration of the samples is equipped with a system to ensure the passage of a suitable amount of electric current to the heating wire 116 at a temperature, which sets the hardware-implemented program (not shown) in order to manage the pre-concentrator 100 samples, it is possible for clarity skip sensor 118 temperature.

Compounds described in U.S. patent No. 7217311 (a method of manufacturing a metal composite powder reinforced with carbon nanotubes, and manufactured in this way the powder and Korean patent publication No. 10-2005-0012556 (Metal nanocomposite powders reinforced with carbon nanotubes and method of their manufacture)), can be used as nanocomplexes 114 metals with carbon nanotubes, which are used as adsorbent for volatile organic compounds.

Nanocomplexes 114 metals with carbon nanotubes containing metal nanoparticles in the form of particles is orosco, uniformly distributed in the carbon nanotube. In this case, the metal nanoparticles have a specified size, but the nanoparticles are connected to each other, forming a round shape. Thus, the nanocomplexes 114 metals with carbon nanotubes have a large surface area and show their uniform and excellent conductivity.

When the above nanocomplexes 114 metals and carbon nanotubes are used as the absorbent, the preconcentrator samples designed for efficient concentration of samples toxic gases, such as volatile organic compounds, and also capable of operating at a lower temperature desorption than traditional pre-concentrators samples, because of the rapid and effective thermal conductivity of nanocomplexes 114 metals with carbon nanotubes. Here the traditional pre-concentrators work samples using the method of thermal absorption and desorption.

Moreover, because of the excellent thermal diffusion by nanocomplexes 114 metals with carbon nanotubes is carried out at the stage of filing of desorbed gas sample in the gas analyzing system 400, the sample is desorbed volatile organic compounds can be effectively concentrate, receiving a superior ability is izlozheniya.

Metals in nanocomplexes 114 metals and carbon nanotubes can be selected from the group consisting mostly of metal elements such as cobalt, copper, Nickel, titanium, silver, aluminum, iron, tungsten, etc. that are used as aqueous metal salts or hydrates. Metals can be included in an amount of from 10% to 95%, based on the total number of carbon nanotubes.

The size of the nanocomplexes 114 metals and carbon nanotubes may be in the range from 10 nm to 1000 nm, and the nanocomplexes 114 metals and carbon nanotubes may be present in an amount of from 1 mg to 1 g

The valve 130 switching channels for connection of holes 200 to enter the sample gas unit 110 concentration of the samples so that the block 110 concentration of the samples was able to absorb gas samples, and also for connection of the gas analyzing system 400 unit 110 concentration of the samples so that the sample (volatile organic compounds), desorbed from the block 110 concentration of the samples, it was possible to submit in a gas analyzing system 400.

As described above, the valve 130 channel is designed to selectively connect the hole 200 to enter the sample gas source 300 filing dried gas and gas-analyzing system 400 block 110 the end is tiravanija samples. Next, the ratio of the combination of these components will be described in detail.

According to one exemplary variant of implementation of the present invention, the valve 130 channel consists of deleteport valves containing 10 holes. Here are 10 holes presents a conditional non-P1-P10, and pairs of these holes 10 holes are connected to each other through internal channels.

For example, the first port (P1) communicates with the second port (P2) through internal channels, and the third port (P3) is connected with the fourth port (P4) through internal channels. In the same way the fifth hole (P5) is connected with the sixth hole (P6), the seventh hole (P7) is connected with the eighth hole (P8), and the ninth hole (P9) is connected with the tenth hole (P10).

According Fig. 1 the first port (P1) communicates with the hole 200 to enter the sample gas through the first channel (L1). Dual-port valve (V1) is installed in the first channel (L1)to selectively feeding the sample gas to the first port (P1).

The second hole (P2), United with the first port (P1) through the inner channel, is connected with the ninth hole (P9) through the second channel (L2), and block 110 concentration of samples set in the middle of the second channel (L2).

The third channel (L3)connected with the tenth hole (P10), connected with the ninth is tertium (P9) through the inner channel, and two-port valve (V2) and pump (P) has been consistently found in the third channel (L3).

The fourth channel (L4) is divided into installation position, two-port valve (V1) of the first channel (L1) and then connects to the eighth hole (P8), and the seventh opening (P7), United with the eighth hole (P8) through the inner channel, is connected with the third port (P3) through the fifth channel (L5), and the fourth port (P4), United with the third port (P3) through the internal channel connected to the third channel (L3) on the back of the pump (P) through the sixth channel (L6).

Meanwhile, the fourth channel (L4) connected in the middle with the seventh channel (L7), through which the source 300 of the filing of the dried gas is connected with the fifth hole (P5), and the sixth hole (P6), United with the fifth hole (P5) through the inner channel, is connected with the gas-analyzing system 400 through the eighth channel (L8). Here, the part denoted by the conditional 132 is a part, which is connected, at least two channels. In this case, the part denoted by the conditional 132, is crossed on the drawings, but is not actually connected with the other.

Meanwhile, just before the seventh channel (L7), through which the source 300 of the filing of the dried gas is connected with the fifth hole (P5), the sensor 310 pressure to determine the pressure of the dried gas, block remove moisture, to remove the moisture present in the dried gas, and the controller 330 of flow in order to regulate the flow rate of the dried gas.

In addition, some of the channels are surrounded by isothermal tube 142, and the valve 130 switching channels and some channels are located inside the isothermal block 144.

Next stage of absorption and desorption of the sample will be described in detail with reference to Fig. 1 and 2.

The stage of absorption of the sample for the concentration of volatile organic compounds, which are present in very small quantities in the atmosphere, here described in detail with reference to Fig. 1. Here holes (P1-P10) in the valve 130 of the switching channels are connected, respectively, with the proper channels, as described above.

In such circumstances, when the air containing volatile organic compounds, is drawn through the opening 200 to enter the sample gas, the air sequentially passes through the first channel (L1), the first port (P1) and second hole (P2), the second channel (L2), the ninth hole (P9) and the tenth hole (P10), and the third channel (L3), and finally released into the environment. In this case, volatile organic compounds are absorbed by the nanocomplexes 114 metals with carbon nanotubes in the unit for concentration of samples 110 in the process air flow.

Meanwhile, the source 300 filing dried g is for delivers the dried gas, for example, high-purity nitrogen to the stage of absorption of the sample. The pressure and the flow rate of the incoming nitrogen is regulated by the sensor 310 and pressure regulator 330 flow rate, respectively, so that the feed nitrogen may flow into the gas-analyzing system 400, and the moisture from the gaseous nitrogen is removed in block 320 of moisture removal, for example, in the traps.

Next stage of desorption of the sample for analysis of volatile organic compounds absorbed according to the above stages will be described in detail with reference to Fig. 2.

First of all, the valve 130 switching channels used to decarbonate sample absorbed by nanocomplexes 114 metals with carbon nanotubes. After valve 130 switching channels when the valve 130 switching channels is rotated counterclockwise by an angle of approximately 30° with respect to the configuration shown in Fig. 1, the valve 130, the channel returns to the configuration shown in Fig. 2.

Thus, the first channel (L1) is connected with the tenth hole (P10), the second channel (L2) is connected with the first port (P1) and the eighth hole (P8), and the third channel (L3) is connected to the ninth hole (P9). In addition, the fourth channel (L4) connected with the seventh hole (P7), channel five (L5) soedenjaetsja the second port (P2) and the sixth hole (P6), and the sixth channel (L6) is connected with the third port (P3). In addition, the seventh channel (L7) is connected with the fourth port (P4), and the eighth channel (L8) is connected with the fifth hole (P5).

When the valve 130 channel operates as described above, the heating wire 116 is open at the same time when the valve 130, or immediately after operation of the valve 130. Thus, the temperature of the glass tube 112 in block 110 concentration of samples increases to approximately 350°C within 5 seconds after the operation of the heating wire 116.

When the temperature of the glass tube 112 increases, volatile organic compounds desorbed from the nanocomplexes 114 metals with carbon nanotubes, served in a gas analyzing system 400 through the second channel (L2), the first port (P1) and second hole (P2), channel five (L5), the sixth hole (P6) and the fifth hole (P5), and the eighth channel (L8).

When the desorption of the sample is completed, the valve 130, the channel returns to its original position, i.e. the position which is shown in Fig. 1, to implement the mode backwashing.

This allows you to completely separate stage of desorption from the introduction phase of the desorbed sample, which is introduced into the gas sensor and gas analyzing system 400, and also washing the fifth channel (L5).

In the above-mentioned Kahn is lah (L1-L8) you can use a variety of tubes, made of stainless steel, materials, Teflon and Tygon, depending on the temperature and functions of the flowing gas or the United channels, and when gas chromatography is connected with the rear end of the eighth channel (L8), the eighth channel (L8) can be used by connecting the capillary separation column with the eighth channel (L8).

In addition, the flushing unit 110 concentration of the samples is carried out at only two-port valve (V2) and pump (P), when the valve 130, the channel goes into the position shown in Fig. 1, after increasing the temperature of the glass tube 112 to decarbonate and release of volatile organic compounds remaining in nanocomplexes 114 of the metal with carbon nanotubes.

Fig. 5-8 represent specific experimental examples to illustrate the properties of absorption and desorption of nanocomplexes 114 metals with carbon nanotubes and concentration of volatile organic compounds.

Experimental example 1

To determine how quickly volatile organic compounds desorbers with nanocomplexes 114 metals with carbon nanotubes and put in a gas analyzing system 400 when the instantaneous heating unit 110 concentration of the samples was measured bandwidth desorption.

This experiment is carried out and, introducing volatile organic compounds in the preconcentrator 100 samples and starting valve 130 switching channels when the instantaneous temperature increase of volatile organic compounds, resulting in a measured full width at the level of half-maximum (FWHM) of volatile organic compounds, which were determined using a flame ionization detector (FID) in a traditional gas chromatography (7890A from the company Agilent).

In this case, traditional absorbent (Carbopack X) and different types of nanocomplexes 114 metals with carbon nanotubes (all produced by BIONEER Corp.: 10 mg CNT-Co with a particle size of 1000 nm, 10 mg CNT-Ni with a particle size of 100 nm and 10 mg of CNT-Cu with a particle size of 1000 nm) was used as the absorbent, and isopropyl alcohol, 2-butanone, 1,2-dichloroethane, benzene, toluene, ethylbenzene, p-xylene and o-xylene was used as volatile organic compounds (VOCS). In this case, the concentration of volatile organic compounds was set at 50 billion shares.

The results obtained by measuring the ability of the nanocomplexes 114 metals with carbon nanotubes to decarbonate organic compounds, which are represented graphically and in a table, as shown in Fig. 5.

As shown in Fig. 5, it was found that the nanoparticles CNT-Ni in the nanocomplexes 114 metals and carbon nanotubes have time the er particles 100 nm, which is much less than the particle size (i.e., 1000 nm) nanoparticles CNT-Co and CNT-Cu. Thus, desorption of organic compounds is affected by the size of the nanocomplexes 114 metals with carbon nanotubes.

However, when used various types of metal nanoparticles with the same size particles, the values of the half-width at half-maximum level of metal nanoparticles was observed within 3 seconds and got similar results. Thus, it was found that the absorbed volatile organic compounds effectively desorbers with nanocomplexes 114 metals with carbon nanotubes at room temperature.

Approximate an implementation option 2

This experiment was performed to measure the amount of absorption (i.e., breakthrough volume) on the nanocomplexes 114 metals with carbon nanotubes.

The amount of absorption is defined as the sample volume of air, which is drawn up until the concentration of a specific sample after passing through the block 110 concentration samples will not be reduced to 10% concentration of the sample before passing through the block 110 concentration samples.

This experiment was carried out by performing the following procedure. First, the calibration loop with a volume of 250 µl was installed instead of the preconcentrator 100 samples to otbert the specific concentration of the gas mixture, and analyzed using capillary separation column (HP-1, 30 m × 0.32 mm × 1 μm) for gas chromatography and flame ionization detector.

After that, the preconcentrator 100 samples according to the present invention installed at the front end of the calibration loop with a volume of 250 μl, volatile organic compounds were pulled at a constant speed of 100 ml/min without the implementation stage desorption unit 110 concentration samples and then were analyzed by gas chromatography.

The gas mixture was repeatedly injected at a speed of 100 ml/min until saturation of the nanocomplexes 114 metals with carbon nanotubes in block 110 concentration samples. Then, if the measured peak intensity of the analyzed sample was 10% of the peak intensity in the measurement with a calibration loop with a volume of 250 μl, the volume drawn in the gas mixture was determined as the amount of absorption.

Measured absorbance values 500 billion shares of volatile organic compounds (e.g. benzene, toluene, ethylbenzene, p-xylene, o-xylene, 2-propanol, 2-butanone, 1,2-dichlorethane) on different types of nanocomplexes metals with carbon nanotubes (all produced by BIONEER Corp.: 10 mg CNT-Al with a particle size of 500 nm, CNT-Cu with a particle size of 1000 nm and CNT-Ni with a particle size of 100 nm). Before presenting experimental the main results in Fig. 6-8.

It is evident from Fig. 6-8 Fig. 6 is that the 10 mg CNT-Al with a particle size of 500 nm was used as the absorbent, Fig. 7 is that the CNT-Cu with a particle size of 1000 nm was used as the absorbent, and Fig. 8 is that the CNT-Ni with a particle size of 100 nm was used as the absorbent.

According to these experimental results, it was found that there is a difference in the effectiveness of the nanocomplexes 114 metals with carbon nanotubes depending on the size of the metals and metal nanoparticles related to the nanocomplexes 114 metals with carbon nanotubes, but nanocomplexes 114 metals and carbon nanotubes can be used to effectively concentrate the volatile organic compounds with a higher molecular weight than that of benzene, when compared with traditional absorbents. In addition, it was confirmed that the nanocomplexes 114 metals and carbon nanotubes have more excellent characteristics desorption than traditional absorbents.

Thus, the preconcentrator 100 samples, including absorbent according to the present invention, can be used to effectively enhance the ability of decomposition of the gas sensor or gas-analyzing system 400.

As described above, the preconcentrator 100 samples in accordance with the present image is the shadow can be used for the development of portable analytical devices, to detect, classify and track trace amounts (several billions of shares) of volatile organic compounds. In addition, the preconcentrator 100 samples can be used to monitor residential and industrial areas, determining, for example, volatile components in the atmosphere, volatile components in biological materials, aromatic components in detergents, hydrocarbons in filter paper for diesel fuel and unpleasant odors in real time, and it may play an important role in the development of the next generation of ultra-sensitive sensors that can be used in the fields of chemistry, medical science, military and state security.

1. The preconcentrator samples containing nanocomplexes 114 metals with carbon nanotubes, absorbent and desorbers the sample gas, and the metal in the nanocomplexes 114 metals with carbon nanotubes represents one or more metals selected from the group consisting of cobalt, copper, Nickel, titanium, silver, aluminum, iron, tungsten and their water salts or hydrates.

2. The preconcentrator samples containing:
nanocomplexes 114 metals with carbon nanotubes, absorbent and desorbers the gas sample;
block 110 the concentration of the investments of the samples, includes nanocomplexes 114 metals and carbon nanotubes;
hole 200 to enter the gas sample, the source 300 filing dried gas and gas-analyzing system 400 that is connected with the pre-concentrator designs; and
the valve 130 switching channels for selective connection holes 200 to enter the sample gas source 300 filing dried gas and gas-analyzing system 400 unit 110 concentration samples, and regulation of absorption and desorption of the gas sample from the unit for concentration of samples.

3. The preconcentrator of samples according to claim 2, in which the block 110 concentration of the samples contains:
the first tube;
nanocomplexes 114 metals with carbon nanotubes, filling the first tube for absorption and desorption of the gas sample;
the locking element mounted on both ends of the nanocomplexes 114 metals with carbon nanotubes to capture nanocomplexes 114 metals and carbon nanotubes; and
heating element for heating the first tube to decarbonate volatile organic compounds absorbed into nanocomplexes 114 metals with carbon nanotubes.

4. The preconcentrator of samples according to claim 3, in which each of the nanocomplexes 114 metals with carbon nanotubes has a size of from 10 nm to 1000 nm.

5. the seat reservation hub of samples according to claim 3, in which nanocomplexes 114 metals and carbon nanotubes are present in an amount of from 1 mg to 1 g

6. The preconcentrator of samples according to claim 3, in which the locking element includes:
a couple of items from glass wool 120, each of which both ends are located, respectively, at both ends of the nanocomplexes 114 metals and carbon nanotubes; and
a couple of grids 122 stainless steel, located, respectively, on the outer sides of the elements of glass wool 120.

7. The preconcentrator of samples according to claim 3, in which the heating element is made of Nickel-chromium (Ni-Cr) or platinum wire and contains a heating wire 116 surrounding the first tube.

8. The preconcentrator of samples according to claim 3, in which the block 110 concentration of samples further comprises a sensor 118 temperature to determine the temperature of the first tube and the conduit 124, installed inside the sensor 118 temperature.

9. The preconcentrator of samples according to claim 3, additionally containing isothermal module to prevent condensation of the sample gas.

10. The preconcentrator of samples according to claim 9, in which isothermal module contains isothermal block 144 and insulated tube 140.

11. The preconcentrator samples on any of PP-10, to the m valve 130 channel consists of deleteport valves.

12. The preconcentrator samples in claim 11, in which the valve 130 channel used to carry out the functions backwashing.

13. The preconcentrator samples on any of PP-10, in which the source 300 filing dried gas contains:
the sensor 310 pressure to determine the pressure of the dried gas from a source 300 filing dried gas;
block 320 of moisture removal to remove moisture present in the dried gas;
the controller 330 of the flow velocity to regulate the speed of flow of dried gas; and
the pump output of the dried gas which has passed through the block 110 concentration samples.



 

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2 cl, 1 ex

FIELD: chemistry.

SUBSTANCE: method of preparing standard aerosol samples based on a mixture of fine powder containing defined elements is characterised by that a dispersed mixture of mineral, synthetic and biological materials is used, wherein grain size analysis is used to detect presence of said types of simulating materials and content thereof in a real atmospheric suspension in said region as applied to a specific season is determined.

EFFECT: providing maximum similarity of simulated atmospheric suspensions for different regions and conditions.

11 dwg

FIELD: electricity.

SUBSTANCE: reference sample comprises a metal base with a central zone of reference complex stressed condition through the base thickness. At the edges of the base at one or different sides there is one or several zones of pad welds from another metal, coefficient of linear expansion and yield point of which is lower than the coefficient of linear expansion and yield point of the base metal. The base is first exposed to high-temperature tempering, afterwards control marks or a grid of measurement bases are applied onto surfaces of the central zone of the base at two sides, for two test measurements after high-temperature tempering of the base before applying pad welds and in the end of thermal treatment of the base already with pad welds. The form of the base, locations of pad welds and the mode of thermal treatment are defined in advance as a result of computer simulation modelling by the method of finite elements with account of grades of the base metal and pad welds metals and the required reference complex stressed condition of the central zone of the base through its thickness.

EFFECT: increased validity of results of measurements of mechanical stresses in cross sections of various thick-walled metal structures.

2 cl, 5 dwg

FIELD: agriculture.

SUBSTANCE: device consists of a housing, the electric motor with a shaft, and the storage cylinder-borer. At that the electric motor with the shaft is mounted inside and along the vertical axis of the housing, made in the form of a triangular truss consisting of the upper and lower belts which are interconnected by racks having vertical grooves for guides mounted inside the truss perpendicular to the racks with the ability of vertical movement along them and connected to the housing of the electric motor, equipped with handles extending outside the housing. At that, the electric motor shaft is provided with a magnetostrictive oscillator and has at the end a telescopic rod for removable storage cylinder-borers selected depending on the type of soil.

EFFECT: increased productivity of soil sampling and enhanced functional capabilities.

2 dwg

FIELD: chemistry.

SUBSTANCE: method includes collecting gases in a sampler and subsequent analysis of the sample material. The sampler is insulated from the ambient environment and a portion of distilled water is added, wherein a suspension of solid particles of the exhaust gas is formed by releasing said particles into said portion of water. Formation of the suspension begins after removing foreign dust and soot particles from the exhaust pipe that have settled there when the internal combustion engine is idle. During sample collection, the suspension is mixed and a sterile syringe is used to collect about 40 ml of liquid, which is then analysed on a laser particle analyser to determine particle size and shape distribution therein. Substance analysis of the suspension is then carried out on a light microscope and electron microscope with an energy-dispersion spectrometer for determining material composition of the solid particles and size and shape distribution of said particles.

EFFECT: determining content of nanodispersed and microdispersed solid particles in exhaust gas.

3 dwg

FIELD: mining.

SUBSTANCE: first, selected are directions for elastic wave propagation directions uniformly distributed over the entire volume of specimen to measure propagation speed and to define the length of every direction. Ultrasound pulses excited in specimen are radiated therein at the start of every direction. Elastic wave travel time is defined for every direction to define the means propagation speed in every direction using obtained elastic wave length and travel time. Then, said specimen is deformed to preset magnitude in stepwise manner, via preset time intervals. At every deformation step, said mean propagation speeds are defined for every directed as described above to define mean propagation speeds for separated part of specimen volume by the method of nuclear Gaussian functions with averaging radius of at least 5 mm. Calculations at every deformation step are displayed as the projection of the specimen vertical section with at least 5 mm deep layer with dyeing of projection sections by different colours proportional with calculated speed difference for said sections between current and previous deformation steps to make conclusion of specimen density variation.

EFFECT: higher-quality and more detailed picture of compaction and destruction zones.

4 cl, 4 dwg

FIELD: medicine.

SUBSTANCE: wings of ilium are punctured in an anterior and posterior one-third of the wings with two trocars being inserted into each wing. The bone marrow (BM) is collected by simple aspiration, aspiration irrigation or a combination thereof at an underpressure of 0.6 Atm with using a device. The bone marrow preparation device comprises a disposable multi-channel closed system, an aspiration collection unit and a perfusion unit. The group of inventions also refers to a method for assessing the prepared bone marrow. The effect is ensured by automatic control of myeloaspiration by preparing a biological material with using a special designed device for the bone marrow collection.

EFFECT: using the given method for preparing the bone marrow provides preparing the sterile bone marrow rich in viable multipotent mesenchymal stromal and hemopoietic progenitor cells.

7 cl, 1 ex, 1 dwg, 1 tbl

FIELD: chemistry.

SUBSTANCE: method of zinc extraction from bottom sediments with an ionic liquid includes preparation of an analytic sample. Extraction of zinc from the solid sample is performed with application of the ionic liquid 1-butyl-3-methylimidazolium hexaphosphate with additives of ammonium thiocyanate and potassium iodide with further quantitative determination of zinc (II) ions in a concentrate of an organic phase of the ionic liquid.

EFFECT: providing degree of element extraction close to one hundred percent.

1 dwg, 2 ex, 2 tbl

FIELD: medicine.

SUBSTANCE: invention relates to a cartridge for a bioanalytical reaction device. The cartridge contains at least one chamber for a sample, which has a wall, through which the said sample can be processed or analysed by the bioanalytical reaction device. The cartridge also contains a case and a platform, and the platform contains the said at least one chamber for the sample and is connected with a possibility of travel with the case in such a way that the platform is able to move between the removed position, in which the wall is protected by the case, and the protruded position, in which the wall is outside the case, by putting operating means in action. The bioanalytical reaction device has a slot for reception of the cartridge, and contains an operating device for moving out and removal of the platform.

EFFECT: technical result which is achieved lies in provision of protection of the sample from contamination and damage without excessive complication of the cartridge construction.

15 cl, 5 dwg

FIELD: instrumentation.

SUBSTANCE: system comprises at least two samplers installed in the holes of a bearing element set on a vessel casing. Every sampler is fitted by a tubular lead-in part on the inner installation side of the bearing element and a discharge part on the upper side of the bearing element having sections for hydraulic or pneumatic valves to be connected. Lead-in parts are of different length. The bearing element is made as a removable flange with the holes in it being connecting ports. Each tubular lead-in and discharge parts are made as separate elements. The discharge part is coupled with the connecting port permanently and the tubular lead-in part is coupled with the said port by a detachable joint. Tubular lead-in part of each sampler is made as tubes of lower, middle and upper levels installed in the flange hole on the flange installation side by means of a detachable joint.

EFFECT: universality of a unit due to the possibility of its usage in vessels for fluid products of different types.

10 cl, 5 dwg

FIELD: nanotechnology.

SUBSTANCE: invention relates to nanotechnology and can be used to change effectively the optoelectronic properties of ensembles of silver nanoparticles coated with ligand shell in viscous media and films. The invention can be used to create photonic crystals, optical filters and a new generation of Raman lasers. For obtaining highly ordered assemblies of silver nanoparticles with a ligand shell in high-viscosity aqueous solution of polyvinyl alcohol or gelatin 3.6 mmol/g of silver nitrate solution, 15 mmol/g of sodium oleate and 10 mmol/g of sodium borohydride are added. The reaction proceeds without stirring.

EFFECT: invention enables to obtain high-viscosity media and films assemblies of nanoparticles coated with a ligand shell with low degree of aggregation.

4 ex

FIELD: medicine.

SUBSTANCE: described is a matrix of a biocompatible non-absorbable spatially linked polymer, obtained by exposure to UV light of a photopolymerised composition, which contains oligomers of a methacryl line, is made in the form of an elastic transparent for light two-layered film, a continuous layer of which is smooth, and the other layer, in the form of a relief pattern, is made with the height, equal to half of the matrix thickness, with forming a ring-shaped element, which does not have any common side with adjacent elements.

EFFECT: matrix possesses an adsorbing ability, contributes to regeneration of tissues, isolates an operation wound from the oral cavity side, has elasticity and shape-stability in case of long exposition on the wound surface with a possibility of visual control of the wound state and a possibility of removal from the post-operation area without destruction of regenerated tissues.

2 cl, 4 dwg, 1 tbl, 5 ex

FIELD: medicine, pharmaceutics.

SUBSTANCE: invention refers to an herbal formulation of topical nanoemulsion for treating acne-related skin disorders. The above formulation contains an aqueous phase comprising a therapeutic agent, rose water and/or lemon juice, and an oil phase containing an essential oil, a non-ionic surfactant and an accessory surfactant. The aqueous and oil phases are related within the range of 1:1 to 1:2, while a particle size of the herbal formulation is less than 5 nm. The essential oil is presented by tea tree oil, basil oil, rosemary oil, lavender oil, jojoba oil, bergamot oil, clove oil and peppermint oil. The invention also refers to a method for preparing the herbal formulation which involves providing the aqueous and oil phases, mixing the above phases to produce a mixture to be emulsified with the non-ionic surfactant to prepare a macroemulsion. The prepared macroemulsion is mixed with ethanol to produce a nanoemulsion with a particle size less than 5 nm.

EFFECT: invention provides the herbal formulation with good penetration, prolonged effect causing no irritation.

8 cl, 4 dwg, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to production of biologically active substances which stimulate plant growth and can be used in agriculture. The nanostructured aqueous phosphorite suspension consists of nanoparticles smaller than 100 nm. Said agent is obtained from natural phosphorites by grinding, mixing with water and ultrasonic dispergation.

EFFECT: use of the invention increases cucumber yield during the first month of harvesting 2,0-2,5-fold.

19 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a catalyst system for hydrotreatment of heavy oils. Said catalyst system includes a catalyst having a hydrogenation catalyst function and a cocatalyst. Said catalyst having a hydrogenation function is selected from: a catalyst consisting of MoS2 or WS2, or a mixture thereof in form of plates, or an oil-soluble precursor thereof; a catalyst consisting of MoS2 or WS2, or a mixture thereof in form of plates, or an oil-soluble precursor thereof and V, Ni and Fe sulphides; a catalyst consisting of MoS2 distributed in a carbon-containing matrix which includes crystalline domains of V, Ni and Fe sulphides. The cocatalyst includes nano- or microparticles and is selected from cracking and/or denitrification catalysts, where said cocatalyst consists of zeolites and/or supported oxides, or sulphides, or Ni and/or Co sulphide precursors, in a mixture with Mo and/or W. The invention also relates to a method for hydrotreatment of heavy oils using said catalyst system.

EFFECT: disclosed catalyst system has a synergetic effect on the reaction medium.

13 cl, 2 tbl, 5 ex

FIELD: medicine, pharmaceutics.

SUBSTANCE: invention refers to medicine and pharmaceutics, namely to a drug substance and a biologically active substance carrier for treating and diagnosing representing a nanoparticle having a ferric oxide coated zirconium dioxide nucleus having a nearly spherical shape and a size of 15-100 nm, and to a method for preparing the carrier wherein to a solution containing iron II, iron III and zirconium IV cations, having pH=7.5; an ammonium mixture is added to pH=8-9 at a rate providing preparing t nanoparticles of a pre-set size of 15-100 nm; the product is recovered by centrifugation, washed and lyophilised.

EFFECT: invention provides creating the new drug substance and the biologically active substance carrier.

4 cl, 2 ex, 1 tbl, 3 dwg

FIELD: nanotechnology.

SUBSTANCE: inventions can be used in the field of nanotechnologies and inorganic chemistry. The method of production of boride nanofilm or nanowire comprises depositing on the alumina nanowire or on fiberglass of low-melting glass in vacuum the multiple alternating layers of titanium and boron, after which the resulting composition is gradually heated to a temperature of 1500°C. In another embodiment, the method of production of boride nanofilm comprises depositing of titanium boride layer of nanothickness on alumina nanofilm of the gas phase comprising titanium halogenide and boron.

EFFECT: inventions enable to obtain boride nanostructures.

4 cl, 2 ex

FIELD: chemistry.

SUBSTANCE: coating is based on titanium carbonitride with addition of additional elements which provide the required set of mechanical and tribological properties, as well as biologically active and antibacterial properties. Overall concentrations of basic and additional elements are in the following ratio: 1,2<XiYj<20, where Xi is the overall concentration of basic elements Ti, C, N in the coating, Yj is the overall concentration of additional elements Ag, Ca, Zr, Si, O, P, K, Mn in the coating.

EFFECT: coating has high hardness, low modulus of elasticity, high value of elastic recovery, low coefficient of friction and rate of wear in different physiological media.

1 tbl, 2 ex

FIELD: medicine.

SUBSTANCE: invention relates to the application of a solid medicinal product, which is heated under the impact of an alternating magnetic field, for further therapeutic treatment after surgical ablation of tumours and cancerous ulcers. The medicinal product represents a surgical implant, presented in the form of a physiologically acceptable fabric, sponge or film. The medicinal product contains magnetic particles, which generate heat when excited by an impact of the alternating magnetic field, and in this way, heat the medicinal product.

EFFECT: invention ensures considerable improvement of further treatment after operation on cancerous tumour in comparison with chemotherapy.

21 cl, 14 ex

FIELD: chemistry.

SUBSTANCE: memristor devices are nonvolatile memory devices and can be used to design computer systems based on an artificial neural network architecture. The present device consists of an active layer situated between two current-conducting layers with which it is in electrical contact. The active layer has a resistive switching property and is a double-layer oxide structure HfAlxOy/HfO2. The HfAlxOy layer has high solubility and high equilibrium concentration of oxygen vacancies, and HfO2 is a layer with low solubility of vacancies. The current-conducting layers are made of titanium nitride or tungsten nitride. A super-thin layer of ruthenium oxide with thickness of not less than 0.5 nm is deposited on the HfO2/TiN boundary surface.

EFFECT: high stability of modes of switching resistance to a low- and high-ohmic state, low switching voltage, high technological compatibility with existing silicon-based microcircuit manufacturing processes.

3 cl, 2 dwg

Magnetic materials // 2244971

FIELD: magnetic materials whose axial symmetry is used for imparting magnetic properties to materials.

SUBSTANCE: memory element has nanomagnetic materials whose axial symmetry is chosen to obtain high residual magnetic induction and respective coercive force. This enlarges body of information stored on information media.

EFFECT: enhanced speed of nonvolatile memory integrated circuits for computers of low power requirement.

4 cl, 8 dwg

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