【摘要】 研究了在ＴｒｉｔｏｎＸ—１００存在下，新星色剂苯并噻吐重氮氨基偶氮苯（ＢＴＤＡＢ）与铜（Ⅱ）的显色反应，结果表明，在 ｐＨ１０．５～ １１．７碱性介质中，铜（Ⅱ）与试剂形成１：２的橙红色络合物，其最大吸收波长为 ５３０ｎｍ，表观摩尔吸光系数ε＝１．４７ Ｘ １０~５，铜（Ⅱ）量在０～１４μｇ／２５ｍＬ范围内符合比尔定律．用于铝合金中铜含量的测定，结果令人满意．更多还原

【Abstract】 The colour reaction of benzothiazolyldiazoaminoazobenzene with copper(Ⅱ) has ho studied. In the presence of Triton X-l00, copper(Ⅱ) reacts with BTDAB to form a stable l: 2 complex at pH10.5 - 11.7, the absorption maximum is at 530nm and the molar absorptivity is l.47x 10~5. Beer’s law is obeyed in the rang of 0 - 14ug/25ml for copper(Ⅱ).This method has been used directly for the determination of copper in aluminium alloy with satisfactory results.更多还原