title: [Determination of available as (III) and as (V) in soils by flow injection hydride generation atomic fluorescence spectrometry].
abstract: A method for the determination of available As (III) and As (V) in soils by flow injection hydride generation atomic fluorescence spectrometry (FI-HG-AFS) was presented. As the concentration of As (III) in extract was determined by HG-AFS in the medium of 0.1 mol.L-1 citric acid solution and the total arsenic was determined after FI on-line reduction of As (V) by L-cysteine, the concentration of As (V) was calculated by the difference. The manifolds for FI on-line reduction of As (V) were designed. The chemical conditions and the operating parameters were optimized. The detection limits (3 sigma) of As (III) and As (V) are 0.11 and 0.07 ng.mL-1, respectively, and the relative standard deviation is 1.43 for 7 determinations of 10 ng.mL-1 As (III) solution. The developed method was applied to the determination of available As (III) and As (V) in real soils and the recovery was 82%-104%.
authors.affiliation: College of Chemistry and Environmental Engineering, Jianghan University, Wuhan 430019, China.
authors.forename: Han-dong
authors.initials: HD
authors.lastname: Liu
authors.forename: Jian-bo
authors.initials: JB
authors.lastname: Shi
authors.forename: Quan
authors.initials: Q
authors.lastname: Chi
authors.forename: Zhi-yong
authors.initials: ZY
authors.lastname: Tang
authors.forename: Ze-xiang
authors.initials: ZX
authors.lastname: Jin
authors.forename: Cai-hua
authors.initials: CH
authors.lastname: Xiong
mesh_terms: D001151:Arsenic / Q000032:analysis*; D001152:Arsenicals / Q000032:analysis*; D017022:Flow Injection Analysis / Q000379:methods; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis*; D013050:Spectrometry, Fluorescence / Q000379:methods; D013054:Spectrophotometry, Atomic / Q000379:methods
chemical_list: D001152:Arsenicals; D012987:Soil; D012989:Soil Pollutants; D001151:Arsenic