SLS存在下meso 四(对三甲胺基苯基)卟啉测定微量铜

研究了表面活性剂十二烷基苯磺酸钠（ＳＬＳ） 存在时，ｍｅｓｏ 四（ 对三甲胺基苯基） 卟啉［Ｔ（４ ＴＭＡＰ）Ｐ］ 与铜的显色反应。在ｐＨ＝ ３ ．７ 的ＨＡｃ ＮａＡｃ 介质中，在ＳＬＳ存在下，铜与［Ｔ（４ ＴＭＡＰ）Ｐ］ 形成１∶２ 的稳定配合物，至少在４ ．５ｈ 内吸光度无变化。最大吸收波长位于４１０ｎｍ ，ε＝ ３ ．７９ ×１０５Ｌ·ｍｏｌ－ １·ｃｍ － １ 。铜在０ ～１ ．４０μｇ／２５ｍＬ内有良好线性关系。用于自来水及湖水中铜的测定，相对标准偏差小于３ ％ ，加标回收率在９８ ％ ～１０３％ 之间

Trace Copper Determined in the Presence of SLS meso Tetra(4 Trime Thylammoniumphenyl)Prophrin

In the medium of HAc NaAc(pH3.7),copper reacts with meso tetra(4 trime thylammoniumphenyl)prophrinT(4 TMAP)P]forming a complex in the presence of surfactant SLS.The maximum absorptive wavelength is 410 nm.The apparent molar absorptivity of the complex is 3.79×10 5L·mol -1 ·cm -1 and the molar ratio of Cu 2+ :T(4 TMAP)P] is 1∶2.Copper obeys Beers law between 0～3.6μg/25ml.The average recovery of copper is between 98%～103%,and the coefficient variation is less than 3%,when it is has been applied to the determination of copper in drinking and lake water.