N_2-苯浮选分光光度法测定环境水样中痕量锰(Ⅱ)(英文)  

Spectrophotometric determination of trace manganese(Ⅱ) in environmental water samples by nitrogen-benzene floatation

作　　者：侯延民[1] 李春香[1] 黄卫红[1] 谢吉民[1] 闫永胜[1] 

机构地区：[1]江苏大学化学化工学院

出　　处：《冶金分析》2007年第11期21-24,共4页Metallurgical Analysis

摘　　要：在碱性介质中,Mn(Ⅱ)离子与1-10邻二氮杂菲(phen)和四碘荧光素(TIF)在一定条件下可形成三元缔合物,该缔合物在水中不稳定,但可以在有机溶剂苯中稳定存在,据此建立了溶剂浮选和光度法联用测定痕量锰(Ⅱ)的新方法。该法具有较高的灵敏度(ε=9.6×105L.mol-1.cm-1)和良好的选择性,可用于天然水样中痕量锰(Ⅱ)的测定。A new method for the determination of trace amounts of manganese （Ⅱ） has been developed. Manganese （H） reacts with 1,10-phenanlthroline （phen） to form [Mn（phen）3]^2＋ in alkali solution at pH9.5. Then [Mn（phen）3]2＋ reacts with tetraiodofluorescein （TIF） to form a associated complex, which can be separated and determined by a floatation spectrophotometry based on its stability in organic solvent. The method has high sensitivity and selectivity, with apparent molar absorptivity of 9.6 × 10^5L · mol^-1·cm^-1. The method has been applied to the determination of manganese （Ⅱ） in environmental water samples with satisfactory results.

关 键 词：溶剂浮选 三元缔合物 锰 分光光度法 

分 类 号：X832[环境科学与工程—环境工程]