title: Evaluation of a hydride generation-atomic fluorescence system for the determination of arsenic using a dielectric barrier discharge atomizer.
abstract: A new atomizer based on atmospheric pressure dielectric barrier discharge (DBD) plasma was specially designed for atomic fluorescence spectrometry (AFS) in order to be applied to the measurement of arsenic. The characteristics of the DBD atomizer and the effects of different parameters (power, discharge gas, gas flow rate, and KBH(4) concentration) were discussed in the paper. The DBD atomizer shows the following features: (1) low operation temperature (between 44 and 70 degrees C, depending on the operation conditions); (2) low power consumption; (3) operation at atmospheric pressure. The detection limit of As(III) using hydride generation (HG) with the proposed DBD-AFS was 0.04 microgL(-1). The analytical results obtained by the present method for total arsenic in reference materials, orchard leaves (SRM 1571) and water samples GBW(E) 080390, agree well with the certified values. The present HG-DBD-AFS is more sensitive and reliable for the determination of arsenic. It is a very promising technique allowing for field arsenic analysis based on atomic spectrometry.
authors.affiliation: Department of Chemistry, Key Laboratory for Atomic and Molecular Nanosciences of the Education Ministry, Tsinghua University, Beijing 100084, PR China.
authors.forename: Zhenli
authors.initials: Z
authors.lastname: Zhu
authors.forename: Jixin
authors.initials: J
authors.lastname: Liu
authors.forename: Sichun
authors.initials: S
authors.lastname: Zhang
authors.forename: Xing
authors.initials: X
authors.lastname: Na
authors.forename: Xinrong
authors.initials: X
authors.lastname: Zhang
mesh_terms: D001151:Arsenic / Q000032:analysis*; D001152:Arsenicals / Q000032:analysis; D001894:Borohydrides / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000295:instrumentation* / Q000379:methods*; D013054:Spectrophotometry, Atomic / Q000295:instrumentation / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D001152:Arsenicals; D001894:Borohydrides; D014874:Water Pollutants, Chemical; C028371:potassium borohydride; D001151:Arsenic