摘要
用2-(2-噻唑偶氮)-5-二甲氨基苯甲酸作为显色剂,在pH5.6,波长在620nm和590nm处,用二阶导数光度法,同时测定微量镍和铜.回收率镍为100%～102%,铜为92%～105%,Ni^(2+)、Cu^(2+)在0～16μg/25ml均呈线性关系.
A method of simultaneous determination of Ni (Ⅱ) and Cu (Ⅱ) by secondary derivative photometry is reported in this paper, 2-(2-thiazolyl-azo)-5-dimethylamino benzoic acid (TAMB) is used as chromogenic reagent and the color reaction is carried out in a buffer medium of pH 5. 6. Secondary derivative photometric measurements are made at the wavelengths of 620nm and 590mn. The recoveries obtained for nickel is 100%-102% and for copper is 92%-105%. Linearity holds both for nickel and copper in the range of 0-16μg/25ml.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
1998年第12期553-554,559,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
TAMB
二阶导数
镍
铜
光度法
测定
Secondary derivative photometry Nickel Copper TAMB
