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NBN EN ISO 11426:1999现行

出版:Belgian Standards

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基本信息
标准编号: NBN EN ISO 11426:1999
发布时间:1999/6/1 0:00:00
标准类别:Standard
出版单位:Belgian Standards
标准页数:0
标准简介

Defines a cupellation method (fire assay) determining gold in gold jewellery alloys. The content should lie between 333 and 999 parts per thousand (0/00). Applicable to specify gold alloys incorporating zinc, copper and silver. Modifications are indicated where nickel and/or palladium are present in so-called white gold alloys, as well as for alloys containing 990 or more parts per thousand (0/00) of gold.

标准备注

Supersedes NBN EN 31426. (06/2007)