Methods for chemical analysis of aluminium and aluminium alloys—Part 14:Determination of nickel content
全国有色金属标准化技术委员会(SAC/TC 243)
GB/T 20975的本部分规定了丁二酮肟分光光度法、火焰原子吸收光谱法、Na2EDTA滴定法、丁二酮肟重量法测定铝及铝合金中镍含量。
本部分适用于铝及铝合金中镍含量的仲裁测定。丁二酮肟分光光度法测定范围:0.001 0%～0.010%；火焰原子吸收光谱法测定范围:0.005 0%～3.00%；Na2EDTA滴定法测定范围:5.00%～25.00%；丁二酮肟重量法测定范围:5.00%～30.00%。
注:镍质量分数为＞0.005 0%～0.010%时，采用火焰原子吸收光谱法为仲裁方法；镍质量分数为5.00%～25.00%时，采用Na2EDTA滴定法为仲裁方法。
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