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Chromium Speciation Using Ion Chromatography-Atomic Absorption System with On-Line Preconcentration

 

作者: W.L. Fong,   J.C.Gaston Wu,  

 

期刊: Spectroscopy Letters  (Taylor Available online 1991)
卷期: Volume 24, issue 7-8  

页码: 931-941

 

ISSN:0038-7010

 

年代: 1991

 

DOI:10.1080/00387019108020672

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

A method using ion chromatography-atomic absorption system (IC-AA) with on-line preconcentration unit is developed for the speciation of chromium in aqueous samples. Both Cr(III) and Cr(VI) species are pre-treated with sodium salt of ethylenediaminetetraacetic acid (EDTA) in consecutive steps. The treated samples can then be injected into an on-line preconcentration unit followed by ion chromatographic separation with UV or selective flame AA detection. Both chromium species can be separated within 10 minutes, and the method is applicable for aqueous samples with ppm levels of chromium.

 

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