Determination of precious metals in precious metals jewellery alloys—Method using ICP spectrometry—Part 1:Platinum jewellery alloys—Determination of platinum—Method using a solution with yttrium as internal standard element
GB/T 21198的本部分规定了以钇为内标采用ICP光谱法测定铂合金首饰中铂含量的方法。本部分适用于铂含量为850‰~970‰的铂合金首饰