鲁米诺-EDTA体系测定水样中超痕量镉  

Determination of Ultratrace Cd in Water Samples by Luminol-EDTA Chemiluminescence System

作　　者：王晴晴[1] 杨新安[1] 张王兵[1] 

机构地区：[1]安徽工业大学化学与化工学院,安徽马鞍山243002

出　　处：《安徽工业大学学报（自然科学版）》2015年第2期143-146,共4页Journal of Anhui University of Technology（Natural Science）

基　　金：安徽省自然科学基金项目(1408085QB43)

摘　　要：依据碱性介质中痕量Cd^2＋可以显著增加鲁米诺-EDTA体系的发光强度且强度增加与Cd^2＋质量浓度成正比的特点,建立流动注射-化学发光测定Cd^2＋的方法,并对检测条件进行优化,研究干扰离子对测定结果的影响。结果表明,在优化条件下,Cd^2＋质量浓度在1-30 ng/L范围内与发光强度呈现线性关系,检出限为0.23 ng/L,相对标准偏差为3.5%;用于模拟水样中Cd2＋的检测,回收率92.0%-106.0%。According to the characteristic that trace Cd^2＋can significantly enhance the luminescence intensity of Luminol-EDTA system in alkaline medium, and the signal intensity increased with the analyte concentration proportionally, a sensitive and simple flow injection chemiluminescence（FI-CL） method for the determination of the Cd^2＋was established. The test conditions were optimized and the influence of interfering ions on the determinations result was studied. Experimental results showed, under optimal conditions, the linear range of 1-30 ng/L for Cd2＋was obtained, and the detection limit was determined as 0.23 ng/L, the relative standard deviation was 3.5%.The method has been applied to the determination of Cd^2＋in simulated water samples, and the recovery was92.0%-106.0%.

关 键 词：化学发光 CD^2+ EDTA 痕量分析 

分 类 号：O65[理学—分析化学]