Methods for chemical analysis of aluminium and aluminium alloys—Part 3:Determination of copper content
全国有色金属标准化技术委员会(SAC/TC 243)
GB/T 20975的本部分规定了新亚铜灵分光光度法、火焰原子吸收光谱法和硫代硫酸钠滴定法测定铝及铝合金中铜含量。
本部分适用于铝及铝合金中铜含量的仲裁测定。新亚铜灵分光光度法测定范围：0.000 5%～0.012%；火焰原子吸收光谱法测定范围：0.005 0%～8.00%；硫代硫酸钠滴定法测定范围：3.00%～70.00%。
注： 铜质量分数为0.005 0%～0.012%时，采用新亚铜灵分光光度法为仲裁检验方法；铜质量分数为3.00%～8.00%时，采用火焰原子吸收光谱法为仲裁检验方法。
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