5，10，15，20－四（4－羟基－3－磺酸苯基）卟啉光度法测定水中痕量铜的研究

Study on 5, 10, 15,20-Tetra(4-hydroxy-3-sulphopenyl)porphine for the Spectrophotometric Determination of Trace Copper in Water

在ｐＨ４．０时，铜与标题试判形成１：１的配合物．作工曲线回归方程为Ｙ＝３．０５×１０（－３）＋０．２３１Ｘ，相关系数ｒ＝０．９９９１，其最大吸收波长在４１２ｕｍ处，摩尔吸光系数ε＝２．０３×１０５Ｌ·ｍｏｌ（－１）·ｃｍ（－１）．用含量在０～２．０μｇ／２５ｍｌ范围内符合朗伯比耳定律．

A nw water-soluble porphyrin, 5, 10, 15, 20-tetra(4-hydroxy-3-sulpbopenyl ) -porphine [(4-H-3-SP)P] for the spectrophotometric detemination of trace copper has been studied. The Composition of the complex is Cu￣2+: T (4-H-3-SP ) P=1: 1, and the molar absorptivity is 2. 03 × 10￣5L·mol￣-1· cm￣- 1.