[Determination of available as (III) and as (V) in soils by flow injection hydride generation atomic fluorescence spectrometry].
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%.
Liu
Han-dong
HD
College of Chemistry and Environmental Engineering, Jianghan University, Wuhan 430019, China.
Shi
Jian-bo
JB
Chi
Quan
Q
Tang
Zhi-yong
ZY
Jin
Ze-xiang
ZX
Xiong
Cai-hua
CH
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
D001152:Arsenicals; D012987:Soil; D012989:Soil Pollutants; D001151:Arsenic