天津工业大学学报2018，Vol.37Issue(1)：38-42,5.DOI:10.3969/j.issn.1671-024x.2018.01.007
基于EDTA络合滴定法测定重金属离子浓度
Determination of heavy metal ion concentration based on EDTA complexometric titration
摘要
Abstract
In order to simplify the traditional determination methods of metal ions,using EDTA as the complexing agent, the concentrations of Cu2+was determined with PAN,xylenol orange and urea ammonium sulfate as indicator, the concentrations of Mg2+and Ni2+were determined respectively with chrome black T and xylenol orange as indi-cators.The relative standard deviation(RSD)of the determination of Cu2+concentration was the smallest when the urea ammonium sulfate was used as an indicator,and the value was 0.631%.Therefore,it is better to choose the urea ammonium sulfate for the determination of Cu2+concentration.With eriochrome black T as indica-tor, the RSD of was 0.719%. So the eriochrome black T can be selected to determine of Mg2+concentration. When the xylenol orange was used as indicator,the RSD of Ni2+concentration was 0.760%.Therefore, xylenol orange can be chosen when Ni2+concentration was determined by EDTA complexometric titration. Compared with atomic absorption spectrometry,the determination of metal ion concentration by EDTA complex-ometric titration was simple and convenient,and the result was of high precision and accuracy.关键词
EDTA络合滴定/重金属/铜离子/镁离子/镍离子/离子浓度Key words
EDTA complexometric titration/heavy metal/copper ion/magnesium ion/nickel ion/ion concentration分类
轻工纺织引用本文复制引用
王建坤,范新宇,张昊,郭晶..基于EDTA络合滴定法测定重金属离子浓度[J].天津工业大学学报,2018,37(1):38-42,5.基金项目
国家自然科学基金资助项目(5150030497) （5150030497）
