磷酸盐的电荷转移反应分光光度法测定

Determination of Phosphate by Charge Transfer Spectrophotometry

基于磷钼杂多酸与 3,3’5 ,5’-四甲基联苯胺形成黄色的电荷转移配合物 ,本文提出了一种新的测定磷酸盐的方法 ,其最大吸收波长为 45 0 nm ,摩尔吸光系数为 1.0 8× 10 4L· m ol- 1 · cm- 1 。本方法用于样品中磷酸盐的测定 ,结果令人满意。

A new method was developed,based on forming a charge transfer complex for the spectrophotometric determination of phosphate with 3,3',5,5' tetramethylbenzidine.The spectrophotometric measurements were carried out at 450nm and the apparent molar absorptivity was 1.08×10 4L·mol -1 ·cm -1 .The method was been applied to wastewater samples with satisfactory results.