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Talanta. 2013 May 15;109:128-32. doi: 10.1016/j.talanta.2013.01.059. Epub 2013 Feb 21.

Interface of on line coupling capillary electrophoresis with hydride generation electrothermal atomic absorption spectrometry and its application to arsenic speciation in sediment.

Author information

1
Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), College of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004, China. dengby16@163.com

Abstract

A novel interface for on line coupling capillary electrophoresis with hydride generation electrothermal atomic absorption spectrometry (CE-HG-ETAAS) has been developed. The interface performance was examined in detail. The technique could be used to convert arsenic compounds from CE separation to corresponding volatile hydrides determined by HG-ETAAS. This paper aims to explore the best condition in the speciation analysis of inorganic arsenic by using CE-HG-ETAAS. The application of the developed CE-HG-ETAAS to inorganic arsenic speciation in sediment was investigated. The detection limits of As(III) and As(V) were 135 ng/g and 160 ng/g, respectively. Relative standard deviations of arsenic speciation were better than 2%. The recoveries of As(III) and As(V) in the sample with spiking concentration of 2500 ng/g As(III) and 5000 ng/g As(V) were 97.6% and 96.7%, respectively.

PMID:
23618149
DOI:
10.1016/j.talanta.2013.01.059
[Indexed for MEDLINE]

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