Determination of 14 Trace Elements in Geochemical Samples by ICP-MS Using Kinetic Energy Discrimination Mode
BACKGROUND Traditional inductively coupled plasma-mass spectrometry (ICP-MS) determination of trace elements such as Ag and Cd in geochemical samples is seriously affected by the matrix effect and multiple polyatomic ions, making it difficult to measure these elements accurately. OBJECTIVES To compa...
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| Format: | Article |
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Science Press, PR China
2019-07-01
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| Series: | Yankuang ceshi |
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| Online Access: | http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.201812070131 |
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| author | XU Jin-li XIING Xia TANG Rui-ling HU Meng-ying ZHANG Peng-peng BAI Jin-feng ZHANG Qin |
| author_facet | XU Jin-li XIING Xia TANG Rui-ling HU Meng-ying ZHANG Peng-peng BAI Jin-feng ZHANG Qin |
| author_sort | XU Jin-li |
| collection | DOAJ |
| description | BACKGROUND Traditional inductively coupled plasma-mass spectrometry (ICP-MS) determination of trace elements such as Ag and Cd in geochemical samples is seriously affected by the matrix effect and multiple polyatomic ions, making it difficult to measure these elements accurately. OBJECTIVES To compare the results of ICP-MS standard mode (STD) and kinetic energy discrimination mode (KED), and determine the valid determination modes of each element. METHODS The samples were digested by HNO3-HF-HClO4, and the residue was dissolved in aqua regia. Under the KED mode, the isotopes with less interference were selected as the determination isotopes. Rh was used as the internal standard element to correct the signal drift, and the sample solution was diluted by 1000. Under these conditions, the matrix effect was minimized. RESULTS The productivity of matrix elements such as Zr and Nb oxides was reduced, and the interference of oxides on Ag and Cd was minimized under the KED mode. The KED mode improved the signal-to-noise ratio and reduced the detection limits of this method with Ag and Cd, detection limits of 0.004mg/kg and 0.005mg/kg, respectively. The detection limits of the other 12 elements were also lower than those of 76 element analysis schemes in a multi-objective geochemical survey. The accuracy of determination of trace elements was significantly better than that of the STD mode. CONCLUSIONS The method has been verified by the first-class national reference material and the analytical results are in good agreement with the certified values. The method provides high-quality data for exploration geochemistry. |
| first_indexed | 2024-04-10T23:07:34Z |
| format | Article |
| id | doaj.art-26924c03a579441a91fecf7535985d61 |
| institution | Directory Open Access Journal |
| issn | 0254-5357 |
| language | English |
| last_indexed | 2024-04-10T23:07:34Z |
| publishDate | 2019-07-01 |
| publisher | Science Press, PR China |
| record_format | Article |
| series | Yankuang ceshi |
| spelling | doaj.art-26924c03a579441a91fecf7535985d612023-01-13T10:05:08ZengScience Press, PR ChinaYankuang ceshi0254-53572019-07-0138439440210.15898/j.cnki.11-2131/td.201812070131ykcs-38-4-394Determination of 14 Trace Elements in Geochemical Samples by ICP-MS Using Kinetic Energy Discrimination ModeXU Jin-li0XIING Xia1TANG Rui-ling2HU Meng-ying3ZHANG Peng-peng4BAI Jin-feng5ZHANG Qin6Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, ChinaInstitute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, ChinaInstitute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, ChinaInstitute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, ChinaInstitute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, ChinaInstitute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, ChinaInstitute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, ChinaBACKGROUND Traditional inductively coupled plasma-mass spectrometry (ICP-MS) determination of trace elements such as Ag and Cd in geochemical samples is seriously affected by the matrix effect and multiple polyatomic ions, making it difficult to measure these elements accurately. OBJECTIVES To compare the results of ICP-MS standard mode (STD) and kinetic energy discrimination mode (KED), and determine the valid determination modes of each element. METHODS The samples were digested by HNO3-HF-HClO4, and the residue was dissolved in aqua regia. Under the KED mode, the isotopes with less interference were selected as the determination isotopes. Rh was used as the internal standard element to correct the signal drift, and the sample solution was diluted by 1000. Under these conditions, the matrix effect was minimized. RESULTS The productivity of matrix elements such as Zr and Nb oxides was reduced, and the interference of oxides on Ag and Cd was minimized under the KED mode. The KED mode improved the signal-to-noise ratio and reduced the detection limits of this method with Ag and Cd, detection limits of 0.004mg/kg and 0.005mg/kg, respectively. The detection limits of the other 12 elements were also lower than those of 76 element analysis schemes in a multi-objective geochemical survey. The accuracy of determination of trace elements was significantly better than that of the STD mode. CONCLUSIONS The method has been verified by the first-class national reference material and the analytical results are in good agreement with the certified values. The method provides high-quality data for exploration geochemistry.http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.201812070131rocksoilsedimentagcdacid dissolutioninductively coupled plasma-mass spectrometrykinetic energy discrimination |
| spellingShingle | XU Jin-li XIING Xia TANG Rui-ling HU Meng-ying ZHANG Peng-peng BAI Jin-feng ZHANG Qin Determination of 14 Trace Elements in Geochemical Samples by ICP-MS Using Kinetic Energy Discrimination Mode Yankuang ceshi rock soil sediment ag cd acid dissolution inductively coupled plasma-mass spectrometry kinetic energy discrimination |
| title | Determination of 14 Trace Elements in Geochemical Samples by ICP-MS Using Kinetic Energy Discrimination Mode |
| title_full | Determination of 14 Trace Elements in Geochemical Samples by ICP-MS Using Kinetic Energy Discrimination Mode |
| title_fullStr | Determination of 14 Trace Elements in Geochemical Samples by ICP-MS Using Kinetic Energy Discrimination Mode |
| title_full_unstemmed | Determination of 14 Trace Elements in Geochemical Samples by ICP-MS Using Kinetic Energy Discrimination Mode |
| title_short | Determination of 14 Trace Elements in Geochemical Samples by ICP-MS Using Kinetic Energy Discrimination Mode |
| title_sort | determination of 14 trace elements in geochemical samples by icp ms using kinetic energy discrimination mode |
| topic | rock soil sediment ag cd acid dissolution inductively coupled plasma-mass spectrometry kinetic energy discrimination |
| url | http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.201812070131 |
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