变色酸双偶氮胂酸型显色剂的合成及其与Pb^(2+)反应的光度性能研究  

Synthesis of Bisarsenazo Type Reagents of Chromotropic Acid and Study on the Spectrophotometric Behaviors of Reaction of Reagents With Pb^(2+)

作　　者：聂天明 

机构地区：[1]巨化集团公司,324004

出　　处：《化工生产与技术》1996年第1期39-43,共5页Chemical Production and Technology

摘　　要：合成了八种变色酸双偶氨胂酸型显色剂，并对它们与Pb(2＋)反应的光度性能作了研究；研究结果表明，这些试剂与Pb(2＋)反应具有一定的灵敏度和选择性，反应一般在弱酸性介质中进行，发色瞬时，配合物稳定，最大吸收位于605nm左右。In this article 8 new bisarsenazo type reagents of chromotropic acid have been synthesized. Their colour reactions with Pb(2+) have also been studied. The result is that reaction of these reagents and Pb(2+) have some certain sensitivity and choice. Normally the reaction is completed in weak acidic media. The color-appearnce is at instant and Pb-complexes are stable. Itsmaximum absorption lies at some 605 nm. The apparent absorption of coefficient is (2～3)× 104L. mol-1. cm-1. Usually Beer's law allows 0～150μg Pb/25 ml.

关 键 词：铅 分光光度法 合成 显色剂 

分 类 号：O657.3[理学—分析化学]