title: Interface of on line coupling capillary electrophoresis with hydride generation electrothermal atomic absorption spectrometry and its application to arsenic speciation in sediment.
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.
authors.affiliation: 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
authors.forename: Biyang
authors.initials: B
authors.lastname: Deng
authors.forename: Xiangdong
authors.initials: X
authors.lastname: Qin
authors.forename: Yan
authors.initials: Y
authors.lastname: Xiao
authors.forename: Yingzi
authors.initials: Y
authors.lastname: Wang
authors.forename: Huihui
authors.initials: H
authors.lastname: Yin
authors.forename: Xiangshu
authors.initials: X
authors.lastname: Xu
authors.forename: Caiying
authors.initials: C
authors.lastname: Shen
mesh_terms: D001149:Arsenates / Q000302:isolation & purification*; D018053:Arsenites / Q000302:isolation & purification*; D055664:Electrochemical Techniques / Q000295:instrumentation / Q000379:methods; D019075:Electrophoresis, Capillary / Q000295:instrumentation / Q000379:methods*; D004867:Equipment Design; D019015:Geologic Sediments / Q000737:chemistry*; D057230:Limit of Detection; D013054:Spectrophotometry, Atomic / Q000295:instrumentation / Q000379:methods*
chemical_list: D001149:Arsenates; D018053:Arsenites