对硝基重氮氨基偶氮苯与汞的显色反应  

Colour Reaction of p-Nitrodiazoaminoazobenzene with Mercury(Ⅱ)

作　　者：金文斌[1] 陈慧[1] 丁芳[1] 

机构地区：[1]南通职业大学化工系,南通226007

出　　处：《理化检验（化学分册）》2010年第4期381-382,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：在表面活性剂吐温-60存在下,于pH 8.05的盐酸-硼砂缓冲溶液中,汞对硝基重氮氨基偶氮苯该试剂形成稳定橘红色配合物,其最大吸收波长位于480 nm处,表观摩尔吸光率为1.54×10~5L·mol^(-1)·cm^(-1),汞量在0.7 mg·L^(-1)以内符合比耳定律。方法用于废水样中汞的测定,所得结果与二苯硫腙光度法测得结果相符合。In a borate buffer medium of pH 8.05 and in the presence of Tween-60,mercury（Ⅱ） was reacted with p-nitrodiazoaminoazobenzene（p-NDAAB） forming a stable red complex,having its absorption maximum at the wavelength of 480 nm and apparent molar absorptivity of 1.54×10^5L·mol^-1·cm^-1.Beer＇s law was kept in the range within 0.7 mg·L^-1.The proposed method was applied to the analysis of waste water samples,values of mercury contents found were checked quite well with the results found by the dithizon-photometric method.

关 键 词：光度法 对硝基重氮氨基偶氮苯 汞 废水样 

分 类 号：O657.31[理学—分析化学]