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)

DS/EN 31426-1994 发布历史

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.

DS/EN 31426-1994由丹麦标准化协会 DK-DS 发布于 1994-07-11，并于 1994-07-11 实施。

DS/EN 31426-1994的历代版本如下：

• 1994年07月11日 DS/EN 31426-1994 金首饰合金中金含量的测定．灰吹法（试金分析法）

DS/EN 31426-1994 金首饰合金中金含量的测定．灰吹法（试金分析法） 于 1999-06-07 变更为 DS/EN ISO 11426-1999 。

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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

无

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.