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Determination of selenium in coal ash with microwave digestion and hydride generation-atomic fluorescence spectrometry
|Authors:||Tao Qiuli; Han Zhangxiong; Xiong Ying; Mu Naicang; Luo Hong; Wang Xijie|
|Author Affiliations:||Primary: |
Shaanxi Institute of Geology and Mineral Resources Experiment, Provincial Key Laboratory of Mineral Exploration and Utilization, Xi'an, China
|Volume Title:||Yankuang Ceshi Rock and Mineral Analysis|
|Source:||Yankuang Ceshi = Rock and Mineral Analysis, 32(3), p.445-448. Publisher: Dizhi Chubanshe, Beijing, China. ISSN: 0254-5357|
|Note:||In Chinese with English summary. 21 refs.; illus., incl. 5 tables|
|Summary:||Coal ash containing high selenium content has a comprehensive utilization value. Although selenium in coal ash samples has been studied in some areas, there is no proven reliable method to determine the selenium content in coal ash due to the complex matrix. Following an analysis of coal and soil samples, a method to determine selenium in coal ash using Hydride Generation-Atomic Fluorescence Spectrometry (HG-AFS) is described in this paper. The samples were first digested by microwave digestion in HF+HNO3+H2O2 without other pretreatment. The obtained clear and transparent digestion solution was reduced by 30% HCl. The interferences of coexisting elements were eliminated by adding Fe(III) salt without interfering with Se. The detection limit was 0.020 µg/g. The relative standard deviation was less than 4.2% (n=5). Sample recoveries were the range of 94.0%-105.0%. The method has been validated by analysis of standard reference coal fly ash, and the analytical results are in agreement with certified values, indicating that this is a feasible method to detect Se in coal ash.|
|Subjects:||Ash; Chemical analysis; Fluorescence; Geochemistry; Industrial waste; Methods; Pollution; Selenium; Soil pollution; Spectroscopy; Waste disposal; Hydride generation-atomic fluorescence spectrometry; Microwave digestion|
|Copyright Information:||GeoRef, Copyright 2021 American Geosciences Institute.|
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