A kind of continuous detection method of gold, palladium, platinum, rhodium, iridium, ruthenium in alloy

Abstract

The invention discloses a method for continuous determination of gold, palladium, platinum, rhodium, iridium and ruthenium in secondary alloy materials. The processing method of the test sample is as follows: S1: Weigh 0.2000g of the secondary alloy sample and put it into a 400mL beaker , add 15mL fuming nitric acid to dissolve the sample; S2: After dissolving, let it to room temperature, add 20mL aqua regia and 0.05mL sodium chloride solution; S3: Then add 20mL hydrochloric acid, 2mL hydrogen peroxide, dissolve to 5mL; S4: Then add 80 mL of hydrochloric acid; S5: Pour the above solution into a 200 mL clean volumetric flask and make up to volume with water. The detection method can realize the simultaneous determination of gold, palladium, platinum, rhodium, iridium, and ruthenium by ICP-MS. The reagents used are simple and cheap, the operation process is short, the determination is fast, and the analytical quality fully meets the quality control requirements.

Description

technical field [0001] The invention relates to an element detection method, in particular to a continuous detection method for gold, palladium, platinum, rhodium, iridium and ruthenium in alloys. Background technique [0002] The secondary alloy material is the raw material for precious metal production. This material has not been treated by the separation and enrichment process of precious metal production, so the matrix is ​​high, the interference is large, and the grade of the precious metal element to be tested is low. Among them, the analysis of gold, palladium and platinum is determined by fire test gold separation and enrichment-ICP-AES, rhodium is determined by dissolving hydrochloric acid in aqua regia-atomic absorption determination, iridium is determined by alkali fusion-catalytic colorimetric spectrophotometry, and ruthenium is determined by alkali fusion-distillation Spectrophotometry involves four analysis methods and five positions, but such a detection metho...

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Problems solved by technology

[0002] The secondary alloy material is the raw material for precious metal production. This material has not been treated by the separation and enrichment process of precious metal production, so the matrix is ​​high, the interference is large, and the grade of the precious metal element to be tested is low. Among them, the analysis of gold, palladium and platinum is determined by fire test gold separation and enrichment-ICP-AES, rhodium is determined by dissolving hydrochloric acid in aqua regia-atomic absorption determination, iridium is determined by alkali fusion-catalytic colorimetric spectrophotometry, and ruthenium is determined by alkali fusion-distillation Spectrophotometry involves four analysis methods and five positions, but such a detection method has a very long sample turnover process in each position, especially for rhodium, iridium and ruthenium, which seriously restricts the analysis speed due to the long process of its own analysis method, resulting in the lag of analysis data

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