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.
Talanta. 2013 May 15;109:128-32. doi: 10.1016/j.talanta.2013.01.059. Epub 2013 Feb 21.
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.
开发了一种用于在线耦合毛细管电泳与氢化物发生电热原子吸收光谱法（CE-HG-ETAAS）的新型接口。详细检查了接口性能。该技术可用于将 CE 分离的砷化合物转化为 HG-ETAAS 测定的相应挥发性氢化物。本文旨在通过 CE-HG-ETAAS 探索无机砷形态分析的最佳条件。研究了开发的 CE-HG-ETAAS 在沉积物中无机砷形态分析中的应用。As(III)和 As(V)的检测限分别为 135ng/g 和 160ng/g。砷形态的相对标准偏差均优于 2%。在加标浓度为 2500ng/g As(III)和 5000ng/g As(V)的样品中，As(III)和 As(V)的回收率分别为 97.6%和 96.7%。
