Determination of As (Ⅲ) and As (Ⅴ) in Stream Sediments by Hydride Generation-Atomic Fluorescence Spectrometry with Ultrasonic Extraction
详细信息
- 责任者：Xiao Fang (Faculty of Material Science and Chemical Engineering ; China University of Geosciences ; Wuhan 430074 ; China) ; Tang Zhiyong
- 刊名：Rock and Mineral Analysis
- 出版年：2011
- 卷期：30(5)
- 关键词：arsenic ; 原子荧光光谱法 ; atomic fluorescence spectrometry
- 页码：p.545-549
- 图表：4 illus., 4 tables, 30 refs.
- 分类号：0900
- 出版序号：1741
- issnNo：ISSN0254-5357
- isbnNo：CN11-2131/TD
摘要
An analysis method was established for the determination of As(Ⅲ) and total arsenic in stream sediments by Hydride Generation-Atomic Fluorescence Spectrometry (HG-AFS) by using 4.8 mol/L HCl for ultrasonic extraction at 50 ℃. The amount of As(Ⅴ) could be obtained by substracting As(Ⅲ) from total arsenic. The masking effects of citric acid,sodium citrate,oxalic acid, sodium oxalate,tartaric acid and sodium tartrate on As(Ⅴ) were investigated, then As(Ⅲ) was determined by controlling suitable acidity of medium. The results showed that the best masking effect on As(Ⅴ) is sodium citrate. Moreover, As(Ⅲ) is of higher sensitivity in the medium of sodium citrate. The method is simple, rapid, highly accurate and of low cost.
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