行业标准

GB/T 21198.5-2007 贵金属合金首饰中贵金属含量的测定ICP光谱法第5部分:999‰银合金首饰银含量的测定差减法

Determination of precious metals in precious metals jewellery alloys—Method using ICP spectrometry—Part 5:999‰ silver jewellery alloys—Determination of silver—Difference method

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