A guide to avoid method bias of chromium (III, VI) chemiluminescence determination by luminol-hydrogen peroxide reaction -: Application to water samples

被引:7
|
作者
Meseguer-Lloret, S [1 ]
Campíns-Falcó, P [1 ]
Tortajada-Genaro, LA [1 ]
Blasco-Gómez, F [1 ]
机构
[1] Univ Valencia, Fac Quim, Dept Quim Analit, E-46100 Valencia, Spain
关键词
chromium(III; IV); chemiluminescence; luminol oxidation;
D O I
10.1080/0306731031000101383
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Cr(III) and/or Cr(VI) determinations based on light emission produced by luminol oxidation by hydrogen peroxide in basic aqueous solution catalyzed by Cr(III) were studied in order to diagnose and/or avoid method bias. The calibration step was optimized, and the usefulness of the method for speciating chromium was tested. The use of the standard addition method in the linear interval concentration range made it possible to diagnose the accuracy of the method for real samples. Good results were obtained for several real water samples containing chromium at different concentrations. The proposed protocol made the method traceable with an appropriate certified reference material and with the reference method.
引用
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页码:405 / 416
页数:12
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