Determination of Trace Selenium in High-Carbon and High-Sulfur Geological Samples by Thiol Cotton Fiber Separation-Atomic Fluorescence Spectrometry
BACKGROUND Hydride generation-atomic fluorescence spectroscopy (HG-AFS) is highly sensitive for the determination of trace selenium in geological samples. However, the complex matrix increases the analysis difficulty, especially owing to interference caused by organic carbon, complicated complexes,...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Science Press, PR China
2021-07-01
|
| Series: | Yankuang ceshi |
| Subjects: | |
| Online Access: | http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.202101220013 |
| _version_ | 1797953905880989696 |
|---|---|
| author | MA Wan-ping WEN Han-jie YE Qin ZHAO Yue YANG Ji-hua |
| author_facet | MA Wan-ping WEN Han-jie YE Qin ZHAO Yue YANG Ji-hua |
| author_sort | MA Wan-ping |
| collection | DOAJ |
| description | BACKGROUND Hydride generation-atomic fluorescence spectroscopy (HG-AFS) is highly sensitive for the determination of trace selenium in geological samples. However, the complex matrix increases the analysis difficulty, especially owing to interference caused by organic carbon, complicated complexes, and coexisting ions in samples rich in organic matter and sulfides. Therefore, sample pretreatment is important. The use of conventional thiol cotton fiber (TCF) to enrich and separate selenium often leads to unstable recovery and premature saturation of the TCF when dealing with samples rich in organic matter and sulfides. OBJECTIVES To establish a method suitable for the determination of trace selenium in geological samples rich in organic matter and sulfides. METHODS For samples rich in organic matter, a double TCF column (mTCF=0.15g) was used to carry out adsorption twice. The recovery for high-sulfur geological samples could be increased either by increasing the amount of TCF (mTCF ≤ 0.2g) or reducing the sample amount. RESULTS The measurement results for the reference materials and actual samples showed that the optimized method satisfied the analysis requirements as selenium recoveries of >95.1% and >95.5% were achieved for the organic-rich and sulfide samples, respectively. Microwave digestion can effectively avoid the loss of selenium during digestion; the measured selenium content was consistent with that reported in the literature. CONCLUSIONS The improved method is suitable for geological samples rich in organic matter and sulfides, which can be used to determine trace selenium (ng/g to μg/g levels) in geological samples. |
| first_indexed | 2024-04-10T23:10:26Z |
| format | Article |
| id | doaj.art-c48a684b35de4af58eff5808a7f18f66 |
| institution | Directory Open Access Journal |
| issn | 0254-5357 |
| language | English |
| last_indexed | 2024-04-10T23:10:26Z |
| publishDate | 2021-07-01 |
| publisher | Science Press, PR China |
| record_format | Article |
| series | Yankuang ceshi |
| spelling | doaj.art-c48a684b35de4af58eff5808a7f18f662023-01-13T06:32:59ZengScience Press, PR ChinaYankuang ceshi0254-53572021-07-0140455056010.15898/j.cnki.11-2131/td.202101220013yk202101220013Determination of Trace Selenium in High-Carbon and High-Sulfur Geological Samples by Thiol Cotton Fiber Separation-Atomic Fluorescence SpectrometryMA Wan-ping0WEN Han-jie1YE Qin2ZHAO Yue3YANG Ji-hua4School of Earth Sciences, East China University of Technology, Nanchang 330013, ChinaCollege of Earth Sciences and Resources, Chang'an University, Xi'an 710054, ChinaCollege of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, ChinaCollege of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, ChinaCollege of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, ChinaBACKGROUND Hydride generation-atomic fluorescence spectroscopy (HG-AFS) is highly sensitive for the determination of trace selenium in geological samples. However, the complex matrix increases the analysis difficulty, especially owing to interference caused by organic carbon, complicated complexes, and coexisting ions in samples rich in organic matter and sulfides. Therefore, sample pretreatment is important. The use of conventional thiol cotton fiber (TCF) to enrich and separate selenium often leads to unstable recovery and premature saturation of the TCF when dealing with samples rich in organic matter and sulfides. OBJECTIVES To establish a method suitable for the determination of trace selenium in geological samples rich in organic matter and sulfides. METHODS For samples rich in organic matter, a double TCF column (mTCF=0.15g) was used to carry out adsorption twice. The recovery for high-sulfur geological samples could be increased either by increasing the amount of TCF (mTCF ≤ 0.2g) or reducing the sample amount. RESULTS The measurement results for the reference materials and actual samples showed that the optimized method satisfied the analysis requirements as selenium recoveries of >95.1% and >95.5% were achieved for the organic-rich and sulfide samples, respectively. Microwave digestion can effectively avoid the loss of selenium during digestion; the measured selenium content was consistent with that reported in the literature. CONCLUSIONS The improved method is suitable for geological samples rich in organic matter and sulfides, which can be used to determine trace selenium (ng/g to μg/g levels) in geological samples.http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.202101220013high carbon and high sulfur geological samplesseleniummicrowave digestionthiol cotton fibrehydride generation-atomic fluorescence spectrometry |
| spellingShingle | MA Wan-ping WEN Han-jie YE Qin ZHAO Yue YANG Ji-hua Determination of Trace Selenium in High-Carbon and High-Sulfur Geological Samples by Thiol Cotton Fiber Separation-Atomic Fluorescence Spectrometry Yankuang ceshi high carbon and high sulfur geological samples selenium microwave digestion thiol cotton fibre hydride generation-atomic fluorescence spectrometry |
| title | Determination of Trace Selenium in High-Carbon and High-Sulfur Geological Samples by Thiol Cotton Fiber Separation-Atomic Fluorescence Spectrometry |
| title_full | Determination of Trace Selenium in High-Carbon and High-Sulfur Geological Samples by Thiol Cotton Fiber Separation-Atomic Fluorescence Spectrometry |
| title_fullStr | Determination of Trace Selenium in High-Carbon and High-Sulfur Geological Samples by Thiol Cotton Fiber Separation-Atomic Fluorescence Spectrometry |
| title_full_unstemmed | Determination of Trace Selenium in High-Carbon and High-Sulfur Geological Samples by Thiol Cotton Fiber Separation-Atomic Fluorescence Spectrometry |
| title_short | Determination of Trace Selenium in High-Carbon and High-Sulfur Geological Samples by Thiol Cotton Fiber Separation-Atomic Fluorescence Spectrometry |
| title_sort | determination of trace selenium in high carbon and high sulfur geological samples by thiol cotton fiber separation atomic fluorescence spectrometry |
| topic | high carbon and high sulfur geological samples selenium microwave digestion thiol cotton fibre hydride generation-atomic fluorescence spectrometry |
| url | http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.202101220013 |
| work_keys_str_mv | AT mawanping determinationoftraceseleniuminhighcarbonandhighsulfurgeologicalsamplesbythiolcottonfiberseparationatomicfluorescencespectrometry AT wenhanjie determinationoftraceseleniuminhighcarbonandhighsulfurgeologicalsamplesbythiolcottonfiberseparationatomicfluorescencespectrometry AT yeqin determinationoftraceseleniuminhighcarbonandhighsulfurgeologicalsamplesbythiolcottonfiberseparationatomicfluorescencespectrometry AT zhaoyue determinationoftraceseleniuminhighcarbonandhighsulfurgeologicalsamplesbythiolcottonfiberseparationatomicfluorescencespectrometry AT yangjihua determinationoftraceseleniuminhighcarbonandhighsulfurgeologicalsamplesbythiolcottonfiberseparationatomicfluorescencespectrometry |