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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