Determination of Major Elements in Sepoilite by Inductively Coupled Plasma-Optical Emission Spectrometry with Opening Acid Dissolution
BACKGROUND Sepiolite is a widely used fibrous magnesium-rich silicate clay mineral. Sepiolite is mainly composed of silicon and magnesium, with minor aluminum, potassium, sodium and other impurities. Determination of the major element of sepiolite usually adopts the classical chemical analytical met...
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| Format: | Article |
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Science Press, PR China
2020-05-01
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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.201906030079 |
| _version_ | 1797953829971427328 |
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| author | WANG Li-qiang WANG Jia-song XU Tie-min WU Liang-ying ZENG Jiang-ping ZHENG Zhi-kang WEI Shuang |
| author_facet | WANG Li-qiang WANG Jia-song XU Tie-min WU Liang-ying ZENG Jiang-ping ZHENG Zhi-kang WEI Shuang |
| author_sort | WANG Li-qiang |
| collection | DOAJ |
| description | BACKGROUND Sepiolite is a widely used fibrous magnesium-rich silicate clay mineral. Sepiolite is mainly composed of silicon and magnesium, with minor aluminum, potassium, sodium and other impurities. Determination of the major element of sepiolite usually adopts the classical chemical analytical method. After the alkali melting treatment, the sample is determined by volumetric method, photometry and atomic absorption spectrometry, which is inefficient and time-consuming. Moreover, potassium and sodium cannot be simultaneously determined. OBJECTIVES To find an efficient method for the determination of seven major elements in sepiolite. METHODS The samples were digested by hydrofluoric acid, nitric acid, and perchloric acid. Contents of major elements such as Al2O3 were determined by inductively coupled plasma-optical emission spectrometry (ICP-OES). The dosage of hydrofluoric acid was optimized. The analytical spectral lines were Al 396.153nm, Ti 334.940nm, K 766.490nm, Na 589.592nm, Ca 422.673nm, Mg 285.213nm and Fe 238.204nm, and elements were determined by axial observation. The content of magnesium in sepiolite was high, and there was a certain matrix effect during ICP-OES analysis. A series of high magnesium mixed standard solutions were prepared to match the matrix. RESULTS The linear correlation coefficient of the standard curve of each element was greater than 0.9990, the detection limits of the method were 0.53-3.25μg/g, the relative standard deviations (RSD, n=10) of the measured results were 0.66%-5.65%, and the recoveries of each element were 95.3%-108.5%. CONCLUSIONS Acid dissolution is easy to operate compared with the alkali fusion method. The results are consistent with those obtained by classical chemical analytical methods and thus meet the analytical requirements of sepiolite samples. |
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| id | doaj.art-d0924c9cfe394c66bf17ac5db92274f8 |
| institution | Directory Open Access Journal |
| issn | 0254-5357 |
| language | English |
| last_indexed | 2024-04-10T23:08:17Z |
| publishDate | 2020-05-01 |
| publisher | Science Press, PR China |
| record_format | Article |
| series | Yankuang ceshi |
| spelling | doaj.art-d0924c9cfe394c66bf17ac5db92274f82023-01-13T09:35:00ZengScience Press, PR ChinaYankuang ceshi0254-53572020-05-0139339139710.15898/j.cnki.11-2131/td.201906030079yk201906030079Determination of Major Elements in Sepoilite by Inductively Coupled Plasma-Optical Emission Spectrometry with Opening Acid DissolutionWANG Li-qiang0WANG Jia-song1XU Tie-min2WU Liang-ying3ZENG Jiang-ping4ZHENG Zhi-kang5WEI Shuang6Tianjin Center of Geological Survey, China Geological Survey, Tianjin 300170, ChinaTianjin Center of Geological Survey, China Geological Survey, Tianjin 300170, ChinaTianjin Center of Geological Survey, China Geological Survey, Tianjin 300170, ChinaTianjin Center of Geological Survey, China Geological Survey, Tianjin 300170, ChinaTianjin Center of Geological Survey, China Geological Survey, Tianjin 300170, ChinaTianjin Center of Geological Survey, China Geological Survey, Tianjin 300170, ChinaTianjin Center of Geological Survey, China Geological Survey, Tianjin 300170, ChinaBACKGROUND Sepiolite is a widely used fibrous magnesium-rich silicate clay mineral. Sepiolite is mainly composed of silicon and magnesium, with minor aluminum, potassium, sodium and other impurities. Determination of the major element of sepiolite usually adopts the classical chemical analytical method. After the alkali melting treatment, the sample is determined by volumetric method, photometry and atomic absorption spectrometry, which is inefficient and time-consuming. Moreover, potassium and sodium cannot be simultaneously determined. OBJECTIVES To find an efficient method for the determination of seven major elements in sepiolite. METHODS The samples were digested by hydrofluoric acid, nitric acid, and perchloric acid. Contents of major elements such as Al2O3 were determined by inductively coupled plasma-optical emission spectrometry (ICP-OES). The dosage of hydrofluoric acid was optimized. The analytical spectral lines were Al 396.153nm, Ti 334.940nm, K 766.490nm, Na 589.592nm, Ca 422.673nm, Mg 285.213nm and Fe 238.204nm, and elements were determined by axial observation. The content of magnesium in sepiolite was high, and there was a certain matrix effect during ICP-OES analysis. A series of high magnesium mixed standard solutions were prepared to match the matrix. RESULTS The linear correlation coefficient of the standard curve of each element was greater than 0.9990, the detection limits of the method were 0.53-3.25μg/g, the relative standard deviations (RSD, n=10) of the measured results were 0.66%-5.65%, and the recoveries of each element were 95.3%-108.5%. CONCLUSIONS Acid dissolution is easy to operate compared with the alkali fusion method. The results are consistent with those obtained by classical chemical analytical methods and thus meet the analytical requirements of sepiolite samples.http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.201906030079sepiolitehydrofluoric acid-nitric acid-perchloric acid opening acid dissolutionaluminummajor elementsinductively coupled plasma-optical emission spectrometry |
| spellingShingle | WANG Li-qiang WANG Jia-song XU Tie-min WU Liang-ying ZENG Jiang-ping ZHENG Zhi-kang WEI Shuang Determination of Major Elements in Sepoilite by Inductively Coupled Plasma-Optical Emission Spectrometry with Opening Acid Dissolution Yankuang ceshi sepiolite hydrofluoric acid-nitric acid-perchloric acid opening acid dissolution aluminum major elements inductively coupled plasma-optical emission spectrometry |
| title | Determination of Major Elements in Sepoilite by Inductively Coupled Plasma-Optical Emission Spectrometry with Opening Acid Dissolution |
| title_full | Determination of Major Elements in Sepoilite by Inductively Coupled Plasma-Optical Emission Spectrometry with Opening Acid Dissolution |
| title_fullStr | Determination of Major Elements in Sepoilite by Inductively Coupled Plasma-Optical Emission Spectrometry with Opening Acid Dissolution |
| title_full_unstemmed | Determination of Major Elements in Sepoilite by Inductively Coupled Plasma-Optical Emission Spectrometry with Opening Acid Dissolution |
| title_short | Determination of Major Elements in Sepoilite by Inductively Coupled Plasma-Optical Emission Spectrometry with Opening Acid Dissolution |
| title_sort | determination of major elements in sepoilite by inductively coupled plasma optical emission spectrometry with opening acid dissolution |
| topic | sepiolite hydrofluoric acid-nitric acid-perchloric acid opening acid dissolution aluminum major elements inductively coupled plasma-optical emission spectrometry |
| url | http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.201906030079 |
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