Method for using ICP-AES to accurately measure precious metal content in solution

An ICP-AES, accurate measurement technology, applied in the field of precious metal analytical chemistry, can solve the problem of volume constant volume being affected by changes in ambient temperature, etc., to avoid long detection period, improve accuracy, and avoid interference problems.

Inactive Publication Date: 2017-08-11
SINO PLATINUM METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, there are factors such as the influence of solution viscosity during volume fractionation and the influence of volume constant by ambient temperature changes in the traditional method of using volume dilution internal standard to control detection accuracy.
Therefore, we have improved the above problems and proposed a method for the accurate determination of precious metal c

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  • Method for using ICP-AES to accurately measure precious metal content in solution
  • Method for using ICP-AES to accurately measure precious metal content in solution

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Accurate determination of platinum, rhodium, ruthenium, gold content in precious metal solution.

[0029] This type of precious metal solution is generally the precious metal solution formed in the recovery process. Among them, the content of precious metals is relatively high. Accurate determination requires a method for each precious metal element. Generally, the volumetric method is used to determine platinum, the gravimetric method is used to determine rhodium, the photometric method is used to determine ruthenium, and the atomic absorption method is used to determine gold. Moreover, some of these four methods need to be separated in advance due to mutual interference. With this method, the four elements of platinum, rhodium, ruthenium and gold can be determined simultaneously at one time. The determination steps are as follows:

[0030] (1) 1.000mg / g platinum standard stock solution, 1.000mg / g rhodium standard stock solution, 1.000mg / g ruthenium standard stock ...

Embodiment 2

[0039] Accurate determination of Pt, Pd, Ir, Rh, Ru content in complex precious metal secondary resource materials.

[0040] Such secondary resource materials of complex precious metals are generally enriched materials obtained in the process of pyrometallurgy. It contains relatively high Pt, Pd, Ir, Rh, Ru (content from 0.x%-xx%), and also contains iron, titanium, lead, zinc, nickel, silicon, aluminum, zirconium and other elements. Typical representatives are aqua regia insoluble slag, ruthenium slag, etc. For the determination of precious metals with a content of more than 1x%, the analysis methods (gravimetric method, volumetric method, etc.) of precious metal alloys and compounds are generally used. However, due to the iron, titanium, nickel, zirconium and other elements contained in such materials seriously interfere with the determination of gravimetric and volumetric methods, the test results are abnormal. Therefore, often only ICP-AES can be used for determination. ...

Embodiment 3

[0050] Accurate determination of rhodium content in triphenylphosphine rhodium chloride products:

[0051] Triphenylphosphine rhodium chloride, also known as Wilkinson catalyst, is a magenta crystal, mainly used as a catalyst for catalytic hydrogenation, aldehyde decarbonylation reaction, ene selective hydrogenation, carbonylation, formylation reaction, etc., widely used Used in petrochemical, biological, chemical, chemical and other fields. Generally, the theoretical value of its rhodium content is 11.12%. With the development of the domestic triphenylphosphine rhodium chloride product market, it is necessary to accurately analyze the rhodium content and impurity elements in the triphenylphosphine rhodium chloride product. GB / T23519-2009 Triphenylphosphine rhodium chloride standard stipulates the detection method of rhodium content and impurity elements. The determination of the rhodium mass fraction is to take triphenylphosphine rhodium chloride and burn it in a tubular ele...

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Abstract

The invention discloses a method for using ICP-AES to accurately measure precious metal content in a solution. The method comprises the first step of preparing a precious metal single element standard stocking solution; the second step of preparing an indium internal standard stocking solution; the third step of preparing a precious metal standard working solution, wherein the precious metal standard can be a precious metal single element standard or a standard of mixing of several kinds of precious metal elements); the fourth step of preparing a precious metal sample testing solution; the fifth step of conducting measuring, wherein a proper inductive coupling plasma emission spectrometer (ICP-AES) is selected to test conditions (including setting of an internal standard mode), and a series of solutions like the precious metal standard working solution are measured to draw a working curve, the linearity of the working curve is made larger than or equal to 0.99995, and a sample testing solution B is measured under an equal condition. An instrument automatically searches for the precious metal content value ws in the given sample testing solution B, and the unit is mg/g. The precious metal content Omega p of a precious metal sample is obtained according to fixed weight dilution folds, wherein the formula of Omega p is (ws*m30*100*m27) * 100/(m28*m25), the unit is %, and the precious metal is Au, Pt, Pd, Rh, Ir, and Ru.

Description

technical field [0001] The invention relates to the field of noble metal analytical chemistry, in particular to a method for accurately measuring the noble metal content in complex high-concentration system noble metal solids or solutions by using ICP-AES. Precious metal solid or solution samples in complex high-concentration systems mainly come from high-content precious metal wastes formed during the use of various precious metal products, intermediate materials and solutions formed in metallurgical recycling processes, etc. Background technique [0002] Due to the special physical and chemical properties of precious metals, such as excellent electrical conductivity, catalytic performance, super corrosion resistance and beautiful color, etc., they have been widely used in the electronics industry, petrochemical industry, environmental protection, aerospace and jewelry industries. Applications. Precious metals are expensive due to their relatively small content on the eart...

Claims

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Application Information

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IPC IPC(8): G01N21/73G01N1/38
CPCG01N21/73G01N1/38G01N2001/386G01N2201/13
Inventor 方卫赵云昆马媛杨晓滔任传婷侯文明吴庆伟
Owner SINO PLATINUM METALS CO LTD
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