行业标准

GB/T 21198.4-2007 贵金属合金首饰中贵金属含量的测定ICP光谱法第4部分:999‰贵金属合金首饰贵金属含量的测定差减法

Determination of precious metals in precious metals jewellery alloys—Method using ICP spectrometry—Part 4:999‰precious metals jewellery alloys—Determination of precious metals—Difference method

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