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Method for measuring contents of gold, silver and palladium in crude copper

A method of determination, the technology of blister copper, applied in the field of analytical chemistry, can solve the problems of palladium determination methods that have not been reported in the literature, and achieve the effects of high accuracy, wide linear range and good reproducibility

Inactive Publication Date: 2012-11-14
GEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The precious metals present in blister copper mainly contain gold, silver and palladium, but there is no bibliographical information about the assay method of palladium.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Experimental part

[0045] 1.1 Reagents and instruments

[0046] The reagents used are divided into analytical pure and industrial pure.

[0047] 1.1.1 Anhydrous sodium carbonate, analytically pure.

[0048] 1.1.2 Quartz sand, analytically pure.

[0049] 1.1.3 Soluble starch, analytically pure.

[0050] 1.1.4 Pigment yellow, industrial pure.

[0051] 1.1.5 Refined industrial salt, industrial pure.

[0052] 1.1.6 Borax (sodium tetraborate), analytically pure.

[0053] 1.1.7 Nitric acid (1+7), no chloride ion.

[0054] 1.1.8 Nitric acid (1+1), no chloride ion.

[0055] 1.1.9 Aqua regia: 3 volumes of hydrochloric acid + 1 volume of nitric acid.

[0056] 1.1.10 Thiourea hydrochloride solution: Weigh 20g of thiourea and dissolve it with hydrochloric acid (1+1), transfer it into a 100mL volumetric flask, dilute to the mark with hydrochloric acid (1+1), and mix well.

[0057] 1.1.11 Gold, silver and palladium standard solution (100g / mL): Pipette 10mL of gold standard ...

Embodiment 2

[0098] Experimental part

[0099] 1.1 Reagents and instruments

[0100] The reagents used are divided into analytical pure and industrial pure.

[0101] 1.1.1 Anhydrous sodium carbonate, analytically pure.

[0102] 1.1.2 Quartz sand, analytically pure.

[0103] 1.1.3 Soluble starch, analytically pure.

[0104] 1.1.4 Pigment yellow, industrial pure.

[0105] 1.1.5 Refined industrial salt, industrial pure.

[0106] 1.1.6 Borax (sodium tetraborate), analytically pure.

[0107] 1.1.7 Nitric acid (1+7), no chloride ion.

[0108] 1.1.8 Nitric acid (1+1), no chloride ion.

[0109] 1.1.9 Aqua regia: 3 volumes of hydrochloric acid + 1 volume of nitric acid.

[0110] 1.1.10 Thiourea hydrochloride solution: Weigh 20g of thiourea and dissolve it with hydrochloric acid (1+1), transfer it into a 100mL volumetric flask, dilute to the mark with hydrochloric acid (1+1), and mix well.

[0111] 1.1.11 Gold, silver and palladium standard solution (100μg / mL): Pipette 10mL of gold standard...

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PUM

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Abstract

The invention provides a method for detecting metals such as gold, silver and palladium in crude copper, aiming at the situation that no method for measuring metal palladium in crude copper is available at present. According to the method, the fire assaying enrichment is adopted to obtain precious metal combined grains; and after the grains are dissolved by aqua regia, the contents of gold, silver and palladium in crude copper are measured by using an inductance coupling plasma emission spectrograph in a thiourea hydrochloride medium. The method has the advantages of high accuracy, good reproducibility and wide linear range.

Description

technical field [0001] The application of the present invention relates to a method for determining the content of precious metals in blister copper, such as gold, silver and palladium, which belongs to the technical field of analytical chemistry. Background technique [0002] The determination of gold and silver content in blister copper mainly uses the classic fire test gold method. This method enriches gold and silver through lead buckles, and its accuracy and precision are better. At present, the precious metals present in blister copper mainly include gold, silver and palladium, but there is no literature report on the determination method of palladium. Contents of the invention [0003] The application of the present invention aims to provide a method capable of detecting metals such as gold, silver and palladium in blister copper because there is no method for measuring metal palladium in blister copper at present. [0004] The method described in the application o...

Claims

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Application Information

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IPC IPC(8): G01N21/73
Inventor 刘琮黄兴涛马琳杨露露杜彩云朱丽
Owner GEM CO LTD
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