铬络合物的固相萃取富集和分光光度法测定  

Solid-Phase Extraction Preconcentrationof Chromium Complex and Its Determinationby Spectrophotometry

作　　者：田松柏[1] 

机构地区：[1]北京石油化工科学研究院

出　　处：《分析试验室》1996年第5期33-35,共3页Chinese Journal of Analysis Laboratory

摘　　要：本文提出了用聚乙烯粉末固相萃取铬络合物的方法。在强酸性介质中，Ｃｒ（Ⅵ）与二苯碳酰二肼发生氧化还原反应，反应产物能结合生成稳定的络合物。这种络合物能吸附富集在填充有聚乙烯粉末的萃取柱上，并能用少量甲醇从柱上洗脱下来。文章详细介绍了萃取步骤及各种因素对固相萃取的影响。该富集方法取材、操作简单，已用于地质样品中铬的分析。A solid-phase extraction method for thechromium cornplex using polyethylene as sor-bent is described.In a strongly acidic mediuma redox reaction between Cr (Ⅵ)anddiphenylcarbazide occurs,the resultant prod-uct is a stable complex. This complex can beadsorbed on the polyethylene extraction co-humn and eluted off bv methanol.The extrac-tion procedure and effects of various factors onthe solid-phase extraction were discussed inthis paper. The material needed and oprationof this preconcentration method are simple andthe method has been used for the determina-tion of chromium in geological samples.

关 键 词：分光光度法 固相萃取 二苯碳酰二肼 铬配合物 铬 

分 类 号：O614.611[理学—无机化学] O657.3[理学—化学]