1-(2-苯并噻唑)-3-(4-偶氮苯基)-三氮烯与汞的显色反应研究及应用  

Study on the Colour Reaction of 1 (2 Benzothiazolyl) 3(4 Phenylazophenyl) Triazene with Mercury and Its Application

作　　者：吕泉 杨明华[1] 龚楚儒[1] 吕桂英[1] 王金明 陈爱新 姚云峰 

机构地区：[1]湖北师范学院化学系

出　　处：《分析科学学报》1997年第3期237-239,共3页Journal of Analytical Science

摘　　要：研究了新试剂１－（２－苯并噻唑）－３－（４－偶氮苯基）－三氮烯（ＢＴＰＡＰＴ）与汞的显色反应．在Ｔｗｅｎ－８０存在下，ｐＨ为１１．２０时，Ｈｇ（Ⅱ）与试剂生成红色的１∶１型配合物，最大吸收峰位于５１０ｎｍ，表观摩尔吸光系数为１．１０×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，线性范围０－１４μｇ／２５ｍＬ．建立了可用于饮用水、生活用水和工业废水汞含量测定的方法．This paper investigates the appropriate conditions for the color reaction of a new reagent, 1 (2 Benzothiazolyl) 3(4 phenylazophenyl) triazene(BTPAPT) with mercury(Ⅱ). At pH10.5-12, in the presence of the nonionic surfactant Tween 80, the reagent and mercury(Ⅱ) forms a red complex with high sensitivity. The molar ratio of mercury(Ⅱ) to BTPAPT is 1∶1. The absorption maximum is at 510nm. The molar absorptivity is 1.10×10 5L·mol -1 ·cm -1 . Beers law is obeyed for mercury(Ⅱ) in the range of 0-14μg/25mL. The method can be applied to the determination of the microamount of mercury in water with satisfactory results.

关 键 词：汞 显色反应 BTPAPT 水分析 

分 类 号：O614.243[理学—无机化学] O661.1[理学—化学]