溶剂浮选三元配合物光度法测定痕量铅的研究  

A Study on the Determination of Trace Pb with Solvent Flotation Three-Component Complexes Spectrophotometry

作　　者：闫永胜[1] 陆晓华[2] 李春香[3] 周丰群[3] 侯延民[3] 

机构地区：[1]华中理工大学 [2]华中理工大学环境科学与工程系,武汉430074 [3]河南平顶山师范高等专科学校,平顶山467000

出　　处：《分析科学学报》2000年第3期227-229,共3页Journal of Analytical Science

摘　　要：本文根据酸性条件下 Pb( )能与 I- 形成 [Pb I4 ]2 - 配阴离子 ,该配阴离子易与罗丹明 B(RB+)形成缔合物 ,其缔合物在有机溶剂苯中稳定 ,建立了基于 N2 浮选 Pb( ) -I- - RB+三元体系于苯中的溶剂浮选铅新方法 ,本法灵敏度高 (ε=2 .2× 1 0 5L· mol- 1·cm- 1) ,选择性好 ,实测工业废水中 Pb( ) 。A new solvent flotation spectrophotometry for determination of Pb with threecomponent system of Pb(Ⅱ)I- RB+ flotation in benzene by N 2 is developed. Its principle is that Pb can react with I- to form [PbI 4] 2- complex ion with negative charges in acidic condition, and [PbI 4] 2- can react with RB+ to form steudy associate in organic solvent benzene. The method exhibits high sensitivity and good selectivity. The practical determination results of Pb in industrial waste water is satisfactory.

关 键 词：溶剂浮选 三元配合物 铅 微量分析 废水 光度法 

分 类 号：X132[环境科学与工程—环境科学] O614.433[理学—无机化学]