DS/EN 31426-1994
金首饰合金中金含量的测定.灰吹法(试金分析法)

Determination of gold in gold jewellery alloys-Cupellation method(fire assay)


 

 

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标准号
DS/EN 31426-1994
发布日期
1994年07月11日
实施日期
1994年07月11日
废止日期
发布单位
DK-DS
代替标准
DS/EN ISO 11426-1999
适用范围
This International Standard specifies a cupellation method (fire assay) for the determination of gold in gold jewellery alloys. Preferably the gold content of the alloys lies between 333 and 930 parts by mass per thousand (%o) of gold. The procedure applies specifically to gold alloys incorporating silver, copper and zinc. Some modifications are indicated where nickel and/or palladium are present in the so-called white gold alloys. NOTE 1 This method is intended to be used as the ref-eree method for the determination of fineness in the alloys covered by ISO 9202.




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