苯并噻唑重氮氨基偶氮苯与汞(Ⅱ)的显色反应及其应用  

Colour Reaction of Chromogenic Reagent Benzothiazolyldiazoaminoazobenzene With Mercury(Ⅱ) and Its Application

作　　者：赵书林[1] 夏心泉[1] 吴丽波[1] 余刚[2] 

机构地区：[1]沈阳化工学院高分子系,沈阳110021 [2]沈阳工业大学化工系

出　　处：《分析化学》1997年第10期1206-1209,共4页Chinese Journal of Analytical Chemistry

基　　金：辽宁省自然科学基金

摘　　要：报道了新试剂苯并噻唑重氮氨基偶氮苯的合成及其与汞（Ⅱ）的显色反应。在Ｔｒｉｔｏｎ Ｘ－１００存在下的弱碱性介质中，试剂与汞形成２：１的橙红色络合物，最大吸收波长位于５２０ ｎｍ处，表观摩尔吸光系数为１．５１×１０５Ｌ·ｍｏｌ－１·ｃｍ－１。汞量在 ０～１．２ｍｇ／Ｌ范围内遵守 比尔定律。直接应用于废水中微量汞的测定，结果满意。The synthesis of a new reagent benzothiazolyldiazoaminoazobenzene and its chro- mogenic reaction with mercury (Ⅱ) ion was reported. In a weak alkaline medium, the reagent reacts with mercury(Ⅱ) to form an orange-red complex of component ratio 2: 1. The absorption maximum of the complex is at 520 nm and the apparent molar absorptivity is 1. 51×105L·mol-1·cm-1. Beer's law is obeyed for mercury (Ⅱ) in the range 0-1. 2 mg/L. This method is employed to determine trace amounts of mercury(Ⅱ) in waste water with satisfactory results.

关 键 词：分光光度法 DTDAB 汞 显色剂 

分 类 号：O614.243[理学—无机化学] O657.303[理学—化学]