钯-对二甲氨基亚苄基罗丹宁-乳化剂OP体系光度法测定痕量钯(Ⅱ)的研究及应用

Spectrophotometric Determination of Trace Pd(Ⅱ) in p-Dimethylaminobenzy-lidenerhodanine and Emulsifing Agent-OP System

在 0 .2 m ol· L- 1的硝酸介质中 ,在表面活性剂乳化剂 - OP存在下 ,Pd2 +与对二甲氨基亚苄基罗丹宁形成橙红色络合物 ,最大吸收波长为 490 nm,ε=3.2× 10 4,Pd2 +浓度在 0～ 1.6 μg· m L- 1范围内符合比尔定律 ,测定了络合物的组成比。方法已用于电镀废液中钯的测定 ,结果较为满意。

In the medium of 0.2 mol/L nitric acid and the presence of emulsifing agent OP,Pd 2+ complex with p dimethylaminobenzylidenerhodanine.The maximum absorption wavelength was at 490 nm and ε=3.2×10 4.Beer's law was obeyed in range of 0~1.6 μg/mL Pd 2+ .The method was applied to determine the palladium in electroplating effluent with satisfactory results.