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研究了铜与络天青S(CAS)、喹啉、溴化十六烷基三甲基铵(CTMAB)的显色反应,在pH6.9～8.0之间可形成绿色的四元配合物,其最大吸收波长为592nm,摩尔吸光系数为1.37×10~5,铜量在0～20μg/50ml范围内符合比耳定律.方法可用于钢铁、铝合金中微量铜的测定.
The color reaction of copper with cyromazine S (CAS), quinoline and cetyltrimethylammonium bromide (CTMAB) was studied. A green quaternary complex was formed between pH 6.5 and 8.0. The maximum absorption wavelength is 592nm, the molar absorption coefficient is 1.37 × 10 ~ 5, and the Beer’s law is in the range of 0 ~ 20μg / 50ml.The method can be used for the determination of trace copper in steel and aluminum alloy.