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.
出处
《分析科学学报》
CAS
CSCD
2000年第3期227-229,共3页
Journal of Analytical Science
