摘要
研究了新显色剂２－［２－苯骈噻唑偶氮］－５－二乙氨基苯甲酸［简称ＢＴＡＥＢ］与铜的显色反应。试验结果表明，在ＰＨ３．５～６．５范围内及丙酮存在下，Ｃｕ９Ⅱ）与ＢＡＴＥＢ形成一稳定的蓝色配合物，其组成比为１∶１，最大吸收波长为６５５ ｎｍ，表观摩尔吸光系数为５．９×１０＾４，铜浓度在０～２５μｇ／２５ｍｌ范围内符合比耳定律，该方法灵敏度高、选择性好。应用于铝合金和工业污水中微量铅的测定。
The colour reaction of copper( Ⅱ ) with 2 [2 benzothiazolylazo]-5 diethylaminobenzoic acid(BTAEB) was stud ied. In the presence of acetone,copper( Ⅱ ) reacts with BTAEB to form a stable blue complex at pH 3. 5-6.5,The molar ratio of copper( Ⅱ ) to BTAEB of the complex is found to be 1 : 1. The complex shows an absorbance maximum at 655nm,ancl its appar cnt molar absorptivity is 5.9× 104 L, ?mo-1 ?cm-1. Beer' s Law is obeyed in the concentration range of 0-25μg Cu( Ⅱ )/25ml. The method is highly sensitive and relatively selective. It was applied to the determination of copper in aluminium alloy and indus trial effluent with statisfactory results.
出处
《理化检验（化学分册）》
CSCD
北大核心
1995年第3期147-148,150,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
吸光光度法
铜
BTAEB
铝合金
工业污水
2-[2 benzothiazolylazo] 5-diethylaminobenzoic acid Spectrophotornetric analysis Copper
