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铜(Ⅱ)与漂蓝6B(或铬天青S)和溴化十六烷基三甲铵三元络合物显色反应的研究已有报道。络合物的摩尔吸光系数为10~5左右。我们选用近年来合成的表面活性剂溴化十八烷基二甲基羧甲基铵,其结构式为:(?),缩写为CDCAB。研究了铜(Ⅱ)-漂蓝6B-溴化十八烷基二甲基羧甲基铵三元络合物的显色反应,制定了微量铜的光度测定法。用于测定硅铜节育环的铜释放量,取得满意的结果。在pH 7.4～9.2,铜(Ⅱ)与漂蓝6B和溴化十八烷基二甲基羧甲基铵生成绿色的三元络合物。其最大
Studies on the color reaction between copper (II) and bleached blue 6B (or chrome azure S) and cetyltrimethylammonium bromide ternary complexes have been reported. The molar extinction coefficient of the complex is about 10 to 5. We choose the surfactants synthesized in recent years octadecyl dimethyl carboxymethyl ammonium bromide, the structural formula is: (?), Abbreviated as CDCAB. The color reaction of copper (Ⅱ) - bleached blue 6B - octadecyldimethylcarboxymethylammonium ternary complex was studied, and the photometric determination of trace copper was developed. Used to determine copper release of copper ring, to obtain satisfactory results. At pH 7.4 ~ 9.2, copper (Ⅱ) forms a green ternary complex with bleached blue 6B and octadecyldimethylcarboxymethylammonium bromide. Its largest