显色试剂6-硝基-苯并噻唑重氮氨基偶氮苯的合成及与镉的显色反应  

Synthesis of Nitrobenzothiazolyldiazoaminoazobenzene and Its Colour Reaction With Cadmium

作　　者：夏心泉[1] 赵书林[1] 姜静 吴振铁 

机构地区：[1]沈阳化工学院,沈阳110021

出　　处：《分析化学》1998年第1期103-106,共4页Chinese Journal of Analytical Chemistry

基　　金：辽宁省自然科学基金资助项目。

摘　　要：合成了新的显色试剂６－硝基－苯并噻唑重氮氨基偶氮苯，并研究了在乳化剂ＯＰ存在下马镉的显色反应。镉与试剂于ｐＨ ９．０～１０．０的缓冲介质中形成稳定的红色络合物，表观摩尔吸光系数 ε５２６＝２． ４５ × １０５Ｌ·ｍｏｌ－１·ｃｍ－１，镉浓度在０～ ０． ５ ｍｇ／Ｌ范围内符合比尔定律。该方法灵敏度高，选择性好，并用于废水和环境水样中的微量镉的测定。A new chromogenic reagent, nitrobenzothiazolyldiazoaminoazobenzene (NBTDAA) has been synthesized and used as a highly sensitive reagent for the spectrophotometric determination of cadmium. Results show that in weakly alkaline medium and in the presence of emulsifier OP, the reagent reacts with cadmium to form an orange-red complex which has an absorption maximum at 526 nm. The apparent molar absorptivity is 2. 45 × 105L ·mol- 1 ·cm-1 。 Beer' s law is obeyed over the concentration range of 0-0. 5 mg/L. The interference of various ions has been studied and the method has been used for the determiantion of micro amounts of cadmium in waste water.

关 键 词：分光光度法 镉 NBTDAA 显色反应 

分 类 号：O614.242[理学—无机化学]