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| 流动注射氢化物发生-原子荧光光谱法测定土壤中有效态As(Ⅲ)和As(Ⅴ) | |
| 引用本文： | 刘汉东,史建波,池泉,汤志勇,金泽祥,熊采华.流动注射氢化物发生-原子荧光光谱法测定土壤中有效态As(Ⅲ)和As(Ⅴ)[J].光谱学与光谱分析,2002,22(5):862-864. |
| 作者姓名： | 刘汉东 史建波 池泉 汤志勇 金泽祥 熊采华 |
| 作者单位： | 1. 江汉大学化学与环境工程学院,湖北,武汉,430019 2. 中国地质大学(武汉)材料科学与化学工程学院,湖北,武汉,430074 3. 湖北省地质实验研究所,湖北,武汉,430022 |
| 基金项目： | 国家地质调查局项目,编号DK0 0 0 30 4 8 |
| 摘 要： | 提出了一种流动注射氢化物发生 原子荧光光谱法测定土壤中有效态As(Ⅲ )和As(Ⅴ )的方法。在0 1mol·L-1柠檬酸介质 (pH =3 1)中选择性测定As(Ⅲ ) ,然后用L 半胱氨酸流动注射在线还原As(Ⅴ )后测定总砷 ,由二者之差求得As(Ⅴ )。设计了在线还原及氢化物发生流路和操作程序 ,选择了各项化学条件和流路参数。As(Ⅲ )和As(Ⅴ )的检出限 (3σ)分别为 0 11和 0 0 7ng·mL-1。对于 10ng·mL-1As(Ⅲ )溶液 ,连续7次测定得精密度 (RSD)为 1 43% ,应用于实际土壤样品的测定 ,加标回收率在 82 %～ 10 4%之间 |
| 关 键 词： | 流动注射 氢化物发生 原子荧光光谱法 测定 有效砷 土壤 砷（Ⅲ） 砷（Ⅴ） 污染物分析 |
| 文章编号： | 1000-0593(2002)05-0862-03 |
| 修稿时间： | 2002年4月14日 |
Determination of Available As(Ⅲ) and As(Ⅴ) in Soils by Flow Injection Hydride Generation Atomic Fluorescence Spectrometry |
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| LIU Han-dong ,SHI Jian-bo ,CHI Quan ,TANG Zhi-yong ,JIN Ze-xiang ,and XIONG Cai-hua .College of Chemistry and Environmental Engineering,Jianghan University,Wuhan ,China .Faculty of Material Sciences and Chemical Engineering.Determination of Available As(Ⅲ) and As(Ⅴ) in Soils by Flow Injection Hydride Generation Atomic Fluorescence Spectrometry[J].Spectroscopy and Spectral Analysis,2002,22(5):862-864. | |
| Authors: | LIU Han-dong SHI Jian-bo CHI Quan TANG Zhi-yong JIN Ze-xiang and XIONG Cai-hua College of Chemistry and Environmental Engineering Jianghan University Wuhan China Faculty of Material Sciences and Chemical Engineering |
| Institution: | College of Chemistry and Environmental Engineering, Jianghan University, Wuhan 430019, China. |
| 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%. |
| Keywords: | Flow injection Atomic fluorescence spectrometry Available arsenic Soil |
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