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Method for rapidly measuring content of gold in gold-loaded resin material

A technology for rapid determination and gold content, applied in the preparation of test samples, color/spectral characteristic measurement, etc., can solve the problems of insufficient extraction and high cost, achieve rapid detection, accurate detection effect, simplify sample pretreatment and testing The effect of the process

Inactive Publication Date: 2014-07-16
新疆出入境检验检疫局检验检疫技术中心
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the technical means of pretreatment of foam plastic method, it overcomes the cumbersome procedures, must use special equipment such as fire assay gold furnace, ash blowing furnace, etc., and the disadvantages of high cost, and also overcomes the loss of element content and insufficient extraction caused by direct reference to FAAS flame atomic absorption spectrometry. Fully waited for technical defects, established a method system for rapid determination of gold content in gold-loaded resin materials, achieved fast, convenient and accurate detection results, and realized rapid detection of gold content in gold-loaded resin materials

Method used

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  • Method for rapidly measuring content of gold in gold-loaded resin material
  • Method for rapidly measuring content of gold in gold-loaded resin material
  • Method for rapidly measuring content of gold in gold-loaded resin material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment one: the mensuration of gold content in the gold-loaded resin material

[0037] The method for measuring the gold content in the gold-loaded resin material, the method concrete steps that adopt are as follows:

[0038] (1) Weigh the gold-loaded resin material of the sample and heat it on the electric furnace until no smoke comes out, then ash at 650°C for 2 h to 3 h, take it out and cool it to 25°C, transfer it into a conical flask, and add 10 times the sample mass Measure 1+1 aqua regia, shake well, heat and boil on a hot plate for 1 hour, remove and dilute with water, add saturated bromine water, shake quickly.

[0039] (2) Choose polyurethane or polyether foam plastics, cut into small pieces, wash with water before use, boil in sodium hydroxide solution for 15 minutes, wash with water until neutral, dry in the air, and set aside.

[0040] (3) Add the foamed plastic prepared in step (2), shake it on the shaker for 30 minutes, take out the foamed plastic, w...

Embodiment 2

[0043] Embodiment two: the preparation of gold standard solution

[0044] (1) Divide the 1000 μg / mL Au standard solution into 0.1 mL, 0.2 mL, 0.5 mL, 1 mL, 2 mL, and add 15 mL of 1+1 aqua regia to a 100 mL volumetric flask to prepare A series of standard solutions of 1 μg / mL, 2 μg / mL, 5 μg / mL, 10 μg / mL, and 20 μg / mL are shown in Table 1. For the blank, use a reagent blank, measure it with FAAS and draw a standard curve, The correlation coefficient of the measurement results must be above 0.99.

[0045] Table 1 Preparation of gold standard solution

[0046] Standard solution No. Volume of standard gold solution mL Corresponding concentration of gold in standard solution μg / mL 1 0.100 1.0000 2 0.200 2.0000 3 0.500 5.0000 4 1.000 10.0000 5 2.000 20.0000

[0047] (2) Drawing of gold standard working curve

[0048] Draw the curve with the concentration of gold in the gold standard solution (in μg / mL) as the abscissa and the corresp...

Embodiment 3

[0051] Embodiment three: sample content measurement result

[0052] Calculation formula

[0053]

[0054] In the formula:

[0055] X - the mass fraction of the element to be measured in the sample, %;

[0056] Cx—concentration of the element to be tested in the sample solution, in micrograms per milliliter (μg / mL);

[0057] C0—concentration of the element to be measured in the blank solution, in micrograms per milliliter (μg / mL);

[0058] V - the volume of the sample solution, in milliliters (mL);

[0059] m - the mass of the sample, in grams (g);

[0060] K——dilution factor.

[0061] Determination results of gold content: the samples were determined by FAAS method using the best instrument conditions, and the results, average value and relative standard deviation of 6 times are shown in Table 2.

[0062] Table 2 Test results of Au samples

[0063]

[0064] Conclusion: From the measurement results, it can be seen that the parallelism of the experimental results ob...

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Abstract

The invention discloses a method for rapidly measuring the content of gold in a gold-loaded resin material. A national standard fire assaying method is replaced by a gold-thiourea decomposition gold removal method with plastic foam for adsorption enrichment and separation of a sample, the gold content is directly measured by a flame atomic absorption spectrometry (FAAS) instrument, a gravimetric method in the national standard is changed, the sample pretreatment and test process is simplified, the analysis time is shortened, and the test cost is saved. According to the technical means of plastic foam method pretreatment, the defects that the program is complicated, special equipment such as a fire assaying furnace and a cupellation furnace are needed, the cost is high and the like are overcome, the technical defects of element content loss, insufficient extraction and the like brought by direct use of the FAAS are also overcome, the method system for rapidly measuring the content of gold in the gold-loaded resin material is established, a rapid, convenient and accurate detection effect is achieved, and the method is high in practicality and value.

Description

technical field [0001] The invention relates to the technical field of determination of gold-loaded resin components, in particular, the invention relates to the technical field of rapid determination of gold content in gold-loaded resin materials. Background technique [0002] In recent years, the primary smelting or roughly processed resinous mixed minerals imported under the name of "resin", "gold slag mixture" and other by-products of gold extraction have frequently appeared at ports and borders. It is the so-called "gold-loaded resin material" that is commonly known in the art, that is, the remaining usable and high value-added product in the process of extracting gold ore with resin. [0003] Mineral resources are an important material basis for the sustained growth of the national economy. The contradiction between the large-scale demand for mineral resources in the development of human society and the depletion and poverty of mineral resources is becoming increasingl...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N1/28
Inventor 杨忠刘俊陈婷婷罗小湄
Owner 新疆出入境检验检疫局检验检疫技术中心
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