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说明:本篇“黄铜快速分析方法”续完,有色金属分析部分待续。四、铁的测定三价铁在pH10左右的氨性溶液中,与乙二胺四乙酸及过氧化氢形成稳定的紫红色三元络合物,其分子比为1:1:1。此络合物在530毫微米波长有一吸收峰值。这一络合反应对测定0.1毫克以上的铁,有一定特效性。钴和铬干扰测定。应用此法测定铝黄铜及铁黄铜中的铁时不须经过任何分离手续。
Description: This chapter “rapid analysis of brass ” continued, non-ferrous metal analysis to be continued. Fourth, the determination of iron Ferric ammonia in about pH10 ammonia solution, and ethylenediaminetetraacetic acid and hydrogen peroxide to form a stable purple complex ternary complex, the molecular ratio of 1: 1: 1. This complex has an absorption peak at 530 nm. This complexation reaction for the determination of 0.1 mg of iron, have a certain effect. Cobalt and chromium interference determination. Application of this method for the determination of aluminum brass and iron brass in the iron without going through any separation procedures.