摘要
利用导数分光光度法对水中微量铜的测定进行了研究。在ｐＨ３７ ＨＡｃＮａＡｃ 介质中，当表面活性剂十二烷基苯磺酸钠（ＳＬＳ） 存在时，铜与ｍｅｓｏ四（ 对三甲胺基苯基） 卟啉形成１∶２ 的稳定配合物，其最大吸收在４２０ ｎｍ ，较采用导数分光光度法之前的ε＝ ２４ ×１０５ 提高了５倍。铜在０ ～１４ μｇ／（２５ ｍＬ） 内有良好线性关系。相对标准偏差小于３ ％ ，加标回收率在９８ ％～１０３ ％ 之间。
A method for the determination of trace copper in water is proposed.In the medium of Hac NaAc(pH3.7),copper reacts with meso tetre(4 trimethylammmoniumphenyl) proprin[T(4 TMAP)P] forming a complex in the presence of surfactant SLS.The maximum absorptive wavelength is 410 nm.When measured with “peak valley measurement”,the values of second derivation are proportional to the concentration of Cu 2+ in the rage of 1 1.4 μg/ (25 mL) and the determination sensitivity can raise five times than that of spectrophotometry method.The average recovery of copper is between 98%～103%.Their coefficient of variation is less than 3%.The method has been used to the determination of trace copper in drinking water and the lake water.
出处
《郑州粮食学院学报》
1999年第3期19-20,23,共3页
Journal of Zhengzhou Institute of Technology
基金
河南省教委自然科学基金
关键词
导数分光光度法
卟啉
铜
测定
水分析
meso tetre(4 trimethylammmoniumphenyl) proprin [T(4 TMAP)P]
derivative spectrophotometry
copper
