Speciation Analysis of Arsenic in Soil Samples

详细信息   

• 责任者：Zhang Jing (National Research Center for Geoanalysis ; Beijing 100037 ; China) ; Liu Xiaoduan
• 刊名：Rock and Mineral Analysis
• 出版年：2008
• 卷期：27(3)
• 关键词：原子荧光光谱法 ; atomic fluorescence spectrometry ; 砷 ; arsenic ; 形态分析 ; shape analysis ; 离子色谱法 ; ion chromatography
• 页码：p.179-183
• 图表：9 tables, 8 refs.
• 分类号：0900
• issnNo：ISSN0254-5357
• isbnNo：CN11-2131/TD

摘要

///A new method for analysis of four arsenic species of As (m), As (V), methanearsonic acid (MAA) and dimethyl arsenic acid (DMA) in soil samples was developed. Phosphoric acid was chosen as the extractant and two techniques of ultrasonic wave and water bath were used for extracting the arsenic species from soil samples. Ion chromatography-hydride generation-atomic fluorescence spectrometry was used for the determination of arsenic species. The recovery of the method was 72.0%~105.4% with precision of 2.61%~8.19% RSD (n=5). The analytical results from the study showed that the extraction efficiency by water bath was remarkably superior to that by ultrasonic wave. And the results also showed that the main arsenic species in soils were inorganic arsenic such as arsenate and arsenite, in which As(V) was in abundant and no organic arsenic was detected.