Methods for chemical analysis of aluminium and aluminium alloys—Part 35:Determination of tungsten content—Thiocyanate spectrophotometric method
全国有色金属标准化技术委员会(SAC/TC 243)
GB/T 20975的本部分规定了硫氰酸盐分光光度法测定铝及铝合金中钨含量。本部分适用于铝及铝合金中钨含量的仲裁测定。硫氰酸盐分光光度法测定范围：0.15%~5.00%。本部分不适用于含钨质量分数大于0.005 0%的铝及铝合金。
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