T/JSGA 007-2023 Active Group standards

T/JSGA 007-2023 Determination of cyanide in electroplated gold products using headspace gas chromatography

Publish Date: 2023-06-26 Implement Date: 2023-07-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/JSGA 007-2023

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Jewelry

Publish Date: 2023-06-26

Implement Date: 2023-07-01

Scope

Scope: This document specifies the method for determining cyanide in electroform gold products. This document is applicable to the determination of cyanide in electroform gold products with a content of not less than 2.0 μg/g; Main technical content: The sample is cut into pieces and dissolved in a mixed solution of nitric acid and sodium chloride at low temperature to obtain a sample solution. Under acidic conditions, the sample solution is heated and distilled, and the cyanide ion is distilled out in the form of hydrogen cyanide. It is absorbed by a sodium hydroxide solution to obtain a cyanide ion absorption solution. Under a closed container and a certain temperature, the cyanide in the sample solution is derivatized into cyanide chloride by chloramine T under acidic conditions. The cyanide chloride reaches equilibrium in the headspace bottle, and the gas phase is introduced into the gas chromatograph for separation. The electronic capture detector is used to determine the content of cyanide.