null检测 | Determination of As(Ⅲ) and As(Ⅴ) in soils using sequential extraction combined with flow injection hydride generation atomic fluorescence detection-北京北分瑞利分析仪器（集团）有限责任公司

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Abstract An analytical procedure for determination of As(Ⅲ) and As(Ⅴ) in soils using sequential extraction combined with flow injection (FI) hydride generation atomic fluorescence spectrometry (HG-AFS) was presented. The soils were sequentially extracted by water, 0.6mol/L KH2PO4 solution , 1%(v/v) HCl solution and 1%(w/v) NaOH solution . The arsenite (As(Ⅲ)) in extract was analyzed by HG-AFS in the medium of 0.1 mol/L citric acid solution , then the total arsenic in extract was determined by HG-AFS using on-line reduction of arsenate with L-cysteine . The concentration of arsenate (As(Ⅴ)) was calculated by the difference . The optimum conditions of and determination were studied in detail . The detection limit (3σ) for As(Ⅲ) and As(Ⅴ) were 0.11 and 0.07 ug/L,respectively. The relative standard deviation (R.S.D.) was 1.43%(n=11) at the 10 ug/L As level. The method was applied in the detemination of As(Ⅲ) and As(Ⅴ) of real soils and the recoveries of As(Ⅲ) and As(Ⅴ) were in the range of 89.3-118 and 80.4-111%,respectively.

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上一篇 AF-3310型原子荧光光谱仪检测土壤中的总汞、总砷

下一篇流动注射离子交换分离HG-AFS测定土壤中水溶态锑（Ⅲ）和锑（Ⅴ）

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北京北分瑞利分析仪器（集团）有限责任公司

白金会员丨第22年

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