摘要
废水中非离子表面活性剂与溴镉试剂形成的无色络合物,用1.2-二氯乙烷萃取后,用原子吸收测定络合物中Cd,并间接测定非离子表面活性剂含量。用气提和离子交换树脂分离和浓缩非离子表面活性剂。本法检测限为0.08mg/L,回收率在88%以上。本文对反应条件及干扰进行了研究。
Non--ionic surfactant molecules are extracted into 1,2--dichloroethane as neutral adductwith potassium tetrabromocadmate and determined by atomic absorption spectrometry. With a500 mL water sample, using sublation and ion--exchange for isolation of the surfactants thedetection limit for the method is 0.08 mg/L and the recovery is over 88%. In addition, reac-tion conditions and interferences have been studied.
关键词
非离子
表面活性剂
废水
AAS法
Non-ionic surfactants
Potassium tetrabromocadmate
Atomic absorption
