【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( ) ,结果令人满意更多还原

【Abstract】 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.更多还原