贵金属合金首饰中贵金属含量的测定 ICP光谱法 第2部分：铂合金首饰 铂含量的测定 采用所有微量元素与铂强度比值法

Determination of precious metals in precious metals jewellery alloys - Method using ICP spectrometry - Part 2：Platinum jewellery alloys - Determination of platinum - Method using the intensity ratios of all minor constituents with reference to platinum