标准摘要
[中文适用范围]： 本文件规定了一种测定均质材料中金含量的杯测法（火试金法）。 样品的金含量优选在100至999.5重量份(‰)之间。 超过 999.5 ‰ 的细度可以使用差值光谱法（例如 ISO 15093）来确定。 该程序适用于大多数类型的黄金样品。 针对特定情况（存在大量贱金属、铂或钯、银）进行了一些修改。 它与痕量以上的铱、铑和钌（所有三种元素的总和超过 0.25 ‰）的存在不相容。 该方法也旨在用作 ISO 9202 涵盖的珠宝合金纯度测定的推荐方法。 [外文原描述]： This document specifies a cupellation method (fire assay) for the determination of gold on a material considered homogeneous. The gold content of the sample lies preferably between 100 and 999,5 parts per thousand (‰) by weight. Fineness above 999,5 ‰ can be determined using a spectroscopy method by difference (e.g. ISO 15093 ). The procedure is applicable to most types of gold samples. Some modifications are indicated for specific cases (presence of large amount of base metals, platinum or palladium, silver). It is not compatible with the presence above trace levels of iridium, rhodium and ruthenium (more than 0,25 ‰ for the sum of all three elements). This method is also intended to be used as the recommended method for the determination of fineness in jewellery alloys covered by ISO 9202 .
英文名称Jewellery and precious metals — Determination of gold — Cupellation method (fire assay)