Method of preparing samples for analysis |
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IPC classes for russian patent Method of preparing samples for analysis (RU 2267111):
                
 Method for determining hardness limit of austenite class steel / 2265213
Method includes subjecting samples of steel to preliminary plastic deformation and on basis of wear test results of pre-deformed samples, graph of change of hardness limit of σ-1 samples is built dependent on their level of pre-deformation. Weighed samples are made with same deformation level and value of magnetic tear force Pmag is determined for each weighed sample. Graph of change of magnetic tear force Pmag is built for samples on basis of their pre-deformation level, graph with adjusting curve in coordinates Pmag - σ-1, setting a connection between Pmag and σ-1 dependent on level of pre-deformation. Hardness limit of σ-1 samples is determined by adjusting curve in coordinates Pmag - σ-1.
 Method of measuring duration of serviceability of metals / 2261436
Method can be used for estimation of deformation-strength properties due to applying load as well as for determining damages by means of X-ray diffraction analysis. Values of structural-sensitive parameter of crystal lattice of tested material are determined by X-ray diffraction analysis in initial and post-deformation states. Deformation-strength characteristics of metal are determined by calculation from changes in structural-sensitive parameter. Serviceability is judged by comparing really achieved characteristics with admissible ones. Width of X-ray line β is used as structural-sensitive parameters. Strength of deformation P, deformation Δl provided by the deformation and corresponding values of structural-sensitive parameter β are registered during testing. Dependence of true stresses S and structural-sensitive parameter β on degree of relative residual deformation δ are calculated on the basis of P and Δl. Destruction diagram (S-δ½) and linearized diagram (β½-δ½) are built to show inflection points. Deformation-strength characteristics SD and δD corresponding to inflection point at destruction diagram (destruction point D) is taken as criterion of admissible surface strength which provides maximal serviceability of metal. Factor of merit η and factor of destruction Δ can be also taken as criteria of serviceability of metal.
 Mode of testing railway rails on contact weariness / 2253112
Contact weariness is induced by high-frequency dynamic components of interaction of wheels and rails, which become apparent at moving at high speed. The mode of testing railway rails on contact weariness is in that tested samples of rail steel are rolled by pinch rolls in longitudinal direction until appearance on the surface of the sample of dents and also deep indents. As samples test rails are used. The diameter of a pinch roll is chosen under condition of equality of reduction ratio of linear size of the site of contact of the pinch roll with the rail along the axis of the last in comparison with corresponding size responsible to conditions of exploitation and speed reduction ratio of rolling motion of the pinch roll along exploited rail.
Material for production of assay stone / 2248336
Assay stone is made from oxide ceramic comprising BeO-TiO2. Material affords the ability to obtain assay stone of regular geometric form with surface, electrical and mechanical properties meeting the requirement for material used in assaying control. Claimed material in useful in standard determination followed by electrochemical recovery of precision metals from solution after assaying control.
 How kopaliani lead alloys containing gold and silver, assay analysis / 2237734
The invention relates to the field of analytical chemistry and can be used in the assay analysis for separating precious metals from lead
 The way to control the processing of gold-bearing samples / 2232824
The invention relates to analytical chemistry and can be used for testing gold-bearing natural materials
Method for determination of copper / 2201592
The invention relates to the field of analytical chemistry
 The device for preparation and analysis of samples of liquid alloys / 2174207
The invention relates to metallurgy, and is intended for receipt and analysis of samples of liquid alloys in the laboratory of metallurgical processes on the surface of the alloy and may find application in research laboratories
 The method of determining changes in the properties of semi-finished products made of heat-resistant aluminum alloys after prolonged heating / 2171985
The invention relates to the study of physical and mechanical properties of metals and can be used to analyze the stability properties of heat-resistant aluminum alloys during operation
 Passive fluid sampler / 2265822
Passive fluid sampler comprises reservoir whose top part is open and lid detachably connected with the open part of the reservoir and provided with through opening. The sampler is mounted at the opening in the lid and controls the inflowing fluid sample. The sampler is made of a polymeric semipermeable diaphragm and is the batching member that controls the inflowing the fluid through the opening in the lid.
 Device for sampling / 2265821
Device comprises housing that receives rotatable plug provided with two openings positioned at an angle equal to the angle between the passages that are made in the housing and enter the pipe for sampling and discharging pipe. The housing also has opening for sampling and is provided with the orifice valve mounted in the vicinity of the base of the cylindrical chamber made in the housing and in part bounded with the rotatable plug. The device comprises piston mounted for permitting movement in the rotatable plug in the direction to and off the bottom.
 Method for determining checked containment level of component in synthetic standard samples of composition of aerosols, loaded on a filter / 2265201
Method includes preparing synthetic mixture of substances with calculation of containment of poi component I in one unit of mass of created standard sample, while for each j of n samples of standard aerosol samples, produced from methyl-cellulose films of similar chemical composition, mass mj and intensiveness Iji of lines of x-ray spectrum of fluorescence of i component are measured, linear dependence is produced between Iji and mj, checked value μji for each sample of standard sample is determined from mathematical formula μji=p0imj and its error from formula
Method of treating operational biopsy and sectional material for microscopic examination / 2264608
Samples are placed onto thread-like substrate with 0.5-cm intervals to form a bunch 10-12 cm long, which is loosely placed in container. The latter is successively passed through a series of vessels containing corresponding solutions, while being rotated around its axis to favor uniform treatment of material. Time and conditions are set in accordance with selected procedure. Treatment is commenced by dipping material into formalin at 34-37°C for 2 h followed by washing with running water during 4 h. Material is then dehydrated with 96% alcohol by way of passing container through five vessels: in the first one material is dehydrated for 5 h, in the following three for 3 h in each, and in the fifth vessel for 5 h. Tannage is carried out in alcohol-xylene solution for 1 h and then in xylene for 1 h, after which material is flooded with paraffin at 36°C for 1 h and at 56°C also for 1 h. Finally material is cut into block, which are pasted on wooden supports, cut on microtome, cuts are stained and subjected to microscopic examination.
Method of treating operational biopsy and sectional material for microscopic examination / 2264608
Samples are placed onto thread-like substrate with 0.5-cm intervals to form a bunch 10-12 cm long, which is loosely placed in container. The latter is successively passed through a series of vessels containing corresponding solutions, while being rotated around its axis to favor uniform treatment of material. Time and conditions are set in accordance with selected procedure. Treatment is commenced by dipping material into formalin at 34-37°C for 2 h followed by washing with running water during 4 h. Material is then dehydrated with 96% alcohol by way of passing container through five vessels: in the first one material is dehydrated for 5 h, in the following three for 3 h in each, and in the fifth vessel for 5 h. Tannage is carried out in alcohol-xylene solution for 1 h and then in xylene for 1 h, after which material is flooded with paraffin at 36°C for 1 h and at 56°C also for 1 h. Finally material is cut into block, which are pasted on wooden supports, cut on microtome, cuts are stained and subjected to microscopic examination.
 Device for taking soil samples / 2264607
Device has vehicle with frame, supporting wheels, operator workplace and trailer for energetic means, sample-taker, made in form of rod with groove on working portion and cleaner, force gear for moving sample taker and transporters for receiving and unloading soil samples into tank at operator workplace. Supporting wheel is provided with axis rigidly held on its band, on rolling radius, on which a platform is mounted with possible rotation, connected jointly to frame via relay mechanism, which transfers to it the movement of device. Platform is provided with guides positioned in parallel to device movement vector, along which spring-loaded carriage moves, carrying sample-taker and force gear for its movement, made in form of crank-slide mechanism with one joint rhombus. Slider is connected to hydraulic cylinder with possible reciprocal movement in parallel to platform guides, and console end of rhombus link is jointly connected to sample-taker rod.
 Device for sampling loose materials / 2263890
Device comprises samplers connected with the bushing mounted on the shaft through the plates, drive secured to the base, receiving chute mounted above the transporting belt, and cutting shields. The plane of rotation of the samplers around the axis of the shaft is at an acute angle to the direction of the movement of the transporting belt. Each sampler is connected with the bushing via a telescopic plate, changeable, and provided with the space for filling and space for discharging sample and excess of the loose material, which are interconnected through openings.
 Device for sampling fluid from pipeline / 2263295
Device comprises sampling pipes mounted in the assembling branch pipe inside the pipeline and provided with a device that prevents the sampling pipe against vibration. The device is mounted in the assembling branch pipe. The minimum space between the sampling branch pipe and vibration protecting device is 0.5 of the diameter of the sampling pipe.
 Device for sampling liquid from pipeline / 2262681
Device comprises sampling tube whose inlet openings is oriented toward the flow, flange mounted on the pipeline, valving member mounted on the flange, and chamber with a collar, mounted on the valving members. The chamber is provided with outlet branch pipe having the flange. The outlet of the sampling tube enters the chamber. The sampling tube has the mechanism for lifting and lowering. Between the pipeline and valving members is the ring that is mounted for permitting the sampling tube to pass through it and comprises conical section that co-operates with the bushing mounted on the sampling tube for permitting flexible movement. Between the valving member and chamber is the bearing ring that allows the sampling tube to pass through it and has a section made of a seat of the stop valve. The sampling tube is provided with the section made of the slide of the stop valve that cooperates with the seat of the bearing ring when the sampling member is in the bottom working position.
 Device for taking samples from pipeline / 2261428
Device has sample-taking pipe with locking valve and body with packing gland, mounted on pipeline. Sample-taking pipe is added with flexible armored hose with bushing of ferromagnetic at input. Portion of pipeline in zone of sample-taking device is made of diamagnetic material or paramagnetic material and on outer side is added with constant magnet with possible free movement along pipeline perimeter. Packing gland is made in form of end insert.
 System for sampling and delivering filtrate for ionometry / 2244281
System for sampling and delivering filtrate has filter submerged into tested medium and connected with collecting tank and vacuum pressure source which is connected with top hole of collecting tank by means of pneumatic pipe. System has sample receiving tank connected with collecting tank and control unit which has first output to be connected with vacuum pressure source. Collecting tank has two separated chambers - washing chamber and dispatching chamber. Lower hole of washing chamber has to be lower hole of collecting tank and side hole of dispatching chamber has to be side hole of collecting tank. Floating valve is installed inside washing chamber to shut off lower and top holes. Filter is connected with lower hole of collecting tank through sampling pipe. Side hole of collecting tank is connected with lower hole of tank for receiving samples through sampling pipe. Flow-type sensor and check valve are installed inside transportation pipe. Output of flow-type sensor is connected with input of control unit; second output of control unit is connected with control input of analyzer.
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FIELD: investigating and analyzing materials. SUBSTANCE: method comprises sampling initial material, producing and analyzing group samples before assessing representative mass of analytical samples, estimating representative mass of analytical samples, and calculating the value of the coefficient that characterizes the type of gold-bearing material from the formula proposed. EFFECT: enhanced reliability. 2 ex
The invention relates to analytical chemistry and can be used for sampling and pravoprimenenii gold material, natural and industrial objects. The known method [1, S.11-13] preparation batch of samples for assay analysis, which includes the following operations: sampling source of material with grain size of 1 mm, a score representative of the mass of the samples, grinding the sample to a particle size of grain of 0.20-0,044 mm, evaluation (or choice) representative mass analytical sub-samples and the selection of analytical portions, in which a representative lot samples evaluated by the formula
where M is the sample mass, kg; k - coefficient of proportionality, depending on the nature of the ore and grinding; d is the diameter of the particles of the sample maximum size, mm In this way the material of the original laboratory sample is crushed completely to a particle size of grains of 0.1-0.15 mm, then from it select the analytical sample weighing 25 g or 50 g and lead determination of gold content in the samples. This method has the following disadvantages: assessment representative of the mass of a sample using the formula (1) can lead to overly optimistic results, which increases the cost of sample preparation; - crushing the entire sample material to a grain size of 0.1-0.15 mm leads to additional costs, not the appreciation which I in many cases the accuracy of the analysis; the method does not allow for operational quality control sample preparation; - assigned values of the coefficient k are subjective. Closest to the proposed method is a method [2] preparation batch of samples for assay analysis, including sampling of the source material with grain size of 1 mm; the assessment of the representative mass of analytical samples, selection of analytical samples, grinding analytical sample, selection of the analytical sample. In this way, before the evaluation of the representative mass analytical sample hold formation and analysis of several group of samples, evaluation of representative mass analytical samples are according to the formula
where tp- quantile of the student distribution; D tolerance analysis;
n is the number of fractions that are installed according to existing recommendations or experimentally; αi- mass fraction of the sample material of the i-th fraction of the size of the grain;
mi- weight of the analytic sample used in the analysis of the material of the i-th fraction g;
This method has the following disadvantages: the information obtained during the analysis of the group of samples can be used to control the sample preparation process at the stage of processing of laboratory samples, but cannot be used at earlier stages in the processing of the initial samples (furrow, sadikovic and others); - the process of formation and analysis of several group of samples is of high complexity. The technical result of the invention is to reduce the cost and increase expressnet process of preparing samples of gold-bearing materials for assay analysis. This result is achieved by the fact that in the proposed method of preparing batches of samples for assay analysis, including sampling of the source material with grain size of 1 mm, the formation and analysis of the group of samples before the evaluation of the representative mass of analytical samples, evaluation of representative mass of analytical samples, in the analysis group sample for each type of ore calculated values of the coefficient K according to the formula:
where K - coefficient characterizing the analyzed type of ore; m - the minimum allowable weight group sample, kg; DG.P.permissible relative differences the results of the determination of gold in the analysis of bulk samples; WithG.P.- the gold content in the group in the sample, g/t; and evaluation of representative mass analytical samples are according to the formula
where Mi- representative of the mass of the i-th analytical samples taken from the i-th laboratory samples; Dipermissible relative discrepancy of the results of determination of gold for the i-th laboratory samples; d is the maximum particle size of the sample, mm; n is the number of sub-samples, which should be selected from the i-th analytical sample; Cithe gold content in the i-th member of the sample, g/t; α - coefficient characterizing the mechanical properties of the ore material, α≤2. After that, select analytical sample of the material of ordinary laboratory samples, chop them and lead the definition of gold. The proposed method of preparing batches of samples for assay analysis allows to unify the processing of samples of gold-bearing materials at all stages. The value of K set in the course of the analysis group of the sample, an objective characteristic of gold ore and can be used in preparation for the analysis of subsequent batches of samples of this ore. For the implementation of the proposed method is to generate and analyze one group sample for the selected type ru is s. For this group of samples is not shared by fractions of grain, which allows you to speed up the evaluation process is representative of the mass of analytical samples and reduce implementation costs. We illustrate the proposed method on examples of specific performance. Example 1. On the assay analysis has received a batch of samples of quartz ore, crushed to a particle size of 1 mm in the amount of 157 pieces, weight of the individual member of the sample 1,0-1,5 kg Taken from each member of the sample analytical sample weight 50 g method of dredging on the grid, grind it to a fineness of grain of the material of 0.2 mm and determine the approximate gold content assay method. Establish that the samples contained gold of about 0.2 to 20.1 g/T. Then each member of the sample selected sample weight 50 g method of dredging on the grid and made the group a sample weight of 7.85 kg by mixing the selected material in a mechanical mixer for 40-45 minutes From bulk samples taken 14 analytical hanging weight 5, 10, 20, 25, 50, 75, 100 g, ground to a grain size of 0.2 mm and analyze assay method. The study group samples to determine the average value of the gold in the group sample is 4.6 g/t, set the known methods the minimum allowable mass analytical sample for group a sample of 50 g and the calculated is to see the value of K according to the formula (3) K=0,05·0,5·4,6·0,8=0,092≈0,1. Using the value of K=0.1 and the values of the estimated gold grades in ordinary samples, calculated according to the formula (4) representative mass of analytical samples, with n=3 receive masses of analytical samples from 0,124 to 2.26 kg conclude that for the ordinary individual samples (with a gold content of less than 0.5 g/t) mass is not representative. At the same time, note that for most samples with a gold content of more than 0.5 g/t can be used analytical sample weighing less than 1 kg of these samples by the method of dredging on the grid selected analytical sample of mass M≥1,124 kg Material analytical samples are crushed to a grain size of 0.2 mm and analyze assay method. Thus, the use of the proposed method for a given batch of samples to reduce the mass of comminuted material without reducing the accuracy of determination of gold. Information on the value of the coefficient To transmit geological service to optimize the evaluation process in its early stages. Example 2. On the assay analysis has received a batch of samples of quartz-sulphide ore in the amount of 60 pieces, crushed to 1 mm, the gold content in the samples of 10.2-19.6 g/T. the Mass of laboratory samples of 1.0 to 1.5 kg of example 1 prepare and analyze group sample. Establish that the minimum assume the I weight of the analytic sample for the group of samples equal to 10 g and calculate the value of K according to the formula (3). Get K=0,01·0,8·14,2·0,23=0,026≈0,03. Then by the formula (4) compute a representative mass of analytical samples for n=3. Get masses of analytical samples from 0,048 to 0,034 kg Of material laboratory samples are selected analytical sample of mass M≥0,034 kg method of dredging on the grid, reduce them to a grain size of 0.2 mm and analyze assay method. Information on the value of the coefficient To transmit geological service to optimize the evaluation process in its early stages. Thus, the use of the proposed method for a given batch of samples to reduce the mass of comminuted material without reducing the accuracy of the definitions of gold. According to the experimental verification of the proposed method of preparing batches of samples for assay analysis, compared with the prototype has the following techno-economic advantages: the method allows to increase expressnet assay analysis; the method can reduce the cost of performing the assay analysis; the method allows to unify the process of sampling and pravoprimemenia at all stages. Implementation of the proposed method in analytical laboratories does not require the use of additional equipment and materials. The most appropriate use of the proposed method when conducting GEOLOGIA the exploration works. Sources of information 1. Baryshnikov IVAN Probootborniki and analysis of noble metals, Moscow, metallurgy, 1978, page 11-13, 2. SU 1721108, BI No. 11, 1992 The method of preparing batches of samples for assay analysis, including sampling of the source material with grain size of 1 mm, the formation and analysis of the group of samples before the evaluation of the representative mass of analytical samples, evaluation of representative mass of analytical samples, characterized in that in the process analysis group sample for each type of ore calculated values of the coefficient K by the formula K=0,8m·DG.P.·CG.P., where K - coefficient characterizing the analyzed type of ore; m - the minimum allowable weight group sample, kg; DG.P.permissible relative discrepancy of the results of determination of gold in the analysis of bulk samples; WithG.P.- the gold content in the group in the sample, g/t, and evaluation of representative mass analytical samples are according to the formula
where Mi- representative of the mass of the i-th analytical samples taken from the i-th laboratory samples; Dipermissible relative discrepancy of the results of determination of gold for the i-th laboratory samples; d is the maximum particle size of the sample, mm; n is the number of sub-samples, which should be selected from the i-th analytical sample; Withithe gold content in the i-th member of the sample, g/t; α - coefficient characterizing the mechanical properties of the ore material, α≤2.
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