摘要
采用铬天青Ｓ作显色剂，在表面活性剂ＣＴＭＡＢ存在下，于ｐＨ＝６．０的ＨＡｃ－ＮＨ４Ａｃ缓冲溶液中，利用双波长Ｋ系数法对Ｃｕ，Ｆｅ两混合体系的同时测定进行了研究．方法摩尔吸光系数ΔεＣｕ＝４．０８×１０４，ΔεＦｅ＝８．７５×１０４，线性范围均在０～２２ｍｇ／２５Ｌ．
A new doublewavelength Kcoefficient method for the simultaneous determination of Fe and Cu in citric acid has been developed.The results show that a high sensitivity(Δε Fe =8.75×10 4,Δε Cu =4.08×10 4) can be obtained in the reaction between Fe or Cu and CAS. The procedure for simultaneous determination of the coefficient K and slope of calibration curve by linear plot method is presented.This method has been successfully applied to the analysis of the samples of beverages and chemical agents.
出处
《烟台大学学报（自然科学与工程版）》
CAS
1997年第3期194-198,共5页
Journal of Yantai University(Natural Science and Engineering Edition)
关键词
双波长
K系数法
分光光度法
柠檬酸
铁
铜
doublewavelength, Kcoefficient, spectrophotometry, simultaneous analysis
