Quantitative Determination of Sulfate in Hydrate and Water Systems by Raman Spectrometry
Sulfate content is one of the important parameters in pore water of gas hydrate. The relationship between sulfate and gas hydrate has become an important method to study geochemical anomalies of gas hydrate. It is particularly important to establish a fast and real time method in order to determine...
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Science Press, PR China
2014-05-01
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| Series: | Yankuang ceshi |
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| Online Access: | http://www.ykcs.ac.cn/en/article/id/47f0a32a-6741-4d8d-9863-1ad5778c313b |
| _version_ | 1811167485957767168 |
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| author | DENG Xing-bo CHEN Min LIU Chang-ling REN Hong-bo ZHUANG Xin-guo |
| author_facet | DENG Xing-bo CHEN Min LIU Chang-ling REN Hong-bo ZHUANG Xin-guo |
| author_sort | DENG Xing-bo |
| collection | DOAJ |
| description | Sulfate content is one of the important parameters in pore water of gas hydrate. The relationship between sulfate and gas hydrate has become an important method to study geochemical anomalies of gas hydrate. It is particularly important to establish a fast and real time method in order to determine and therefore understand the cause and mechanism of sulphate concentration anomalies. An explanation of a uniquely designed synthetic experiment for gas hydrate is described in this paper, which is a method for the quantitative determination of sulfate in seawater using Raman Spectrometry at high pressure and low temperature. The relationship between the sulfate content and its Raman spectrum parameters was in a good linear agreement within 2.0-70.0 g/L. The equation of linear regression is R = 0.0013ρ-0.000066. The related coefficient is r = 0.9998. The detection limit is 0.2 g/L. The recoveries are 102.1%-123.8% with precision of 2.5%-3.4% (RSD, n = 12). The test result shows that the changes of sulfate content in gas hydrate and water system on-line by Raman spectroscopy can be detected. Compared to ion chromatography, the original samples remain intact with this method, and it is convenient and rapid. By preliminary analysis of the changes of sulfate content, it was founded that sulfate content basically presented ladder form rise and determined that the formation of gas hydrate was a repeated process of gas dissolution, nucleation and growth until the entire reaction system reaches equilibrium. |
| first_indexed | 2024-04-10T16:10:13Z |
| format | Article |
| id | doaj.art-37c37563b426452a83fe2687a4a78f33 |
| institution | Directory Open Access Journal |
| issn | 0254-5357 |
| language | English |
| last_indexed | 2024-04-10T16:10:13Z |
| publishDate | 2014-05-01 |
| publisher | Science Press, PR China |
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| series | Yankuang ceshi |
| spelling | doaj.art-37c37563b426452a83fe2687a4a78f332023-02-10T01:00:42ZengScience Press, PR ChinaYankuang ceshi0254-53572014-05-01333418423ykcs-33-3-418Quantitative Determination of Sulfate in Hydrate and Water Systems by Raman SpectrometryDENG Xing-bo0CHEN Min1LIU Chang-ling2REN Hong-bo3ZHUANG Xin-guo4Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, ChinaThird Institute of Oceanography, State Oceanic Administration, Xiamen 361005, ChinaThe Key Laboratory of Gas Hydrate, Ministry of Land and Resources, Qingdao 266071, ChinaThe Key Laboratory of Gas Hydrate, Ministry of Land and Resources, Qingdao 266071, ChinaFaculty of Earth Resources, China University of Geosciences, Wuhan 430074, ChinaSulfate content is one of the important parameters in pore water of gas hydrate. The relationship between sulfate and gas hydrate has become an important method to study geochemical anomalies of gas hydrate. It is particularly important to establish a fast and real time method in order to determine and therefore understand the cause and mechanism of sulphate concentration anomalies. An explanation of a uniquely designed synthetic experiment for gas hydrate is described in this paper, which is a method for the quantitative determination of sulfate in seawater using Raman Spectrometry at high pressure and low temperature. The relationship between the sulfate content and its Raman spectrum parameters was in a good linear agreement within 2.0-70.0 g/L. The equation of linear regression is R = 0.0013ρ-0.000066. The related coefficient is r = 0.9998. The detection limit is 0.2 g/L. The recoveries are 102.1%-123.8% with precision of 2.5%-3.4% (RSD, n = 12). The test result shows that the changes of sulfate content in gas hydrate and water system on-line by Raman spectroscopy can be detected. Compared to ion chromatography, the original samples remain intact with this method, and it is convenient and rapid. By preliminary analysis of the changes of sulfate content, it was founded that sulfate content basically presented ladder form rise and determined that the formation of gas hydrate was a repeated process of gas dissolution, nucleation and growth until the entire reaction system reaches equilibrium.http://www.ykcs.ac.cn/en/article/id/47f0a32a-6741-4d8d-9863-1ad5778c313bnature gas hydratesulfateraman spectrometryon-line quantitative determination |
| spellingShingle | DENG Xing-bo CHEN Min LIU Chang-ling REN Hong-bo ZHUANG Xin-guo Quantitative Determination of Sulfate in Hydrate and Water Systems by Raman Spectrometry Yankuang ceshi nature gas hydrate sulfate raman spectrometry on-line quantitative determination |
| title | Quantitative Determination of Sulfate in Hydrate and Water Systems by Raman Spectrometry |
| title_full | Quantitative Determination of Sulfate in Hydrate and Water Systems by Raman Spectrometry |
| title_fullStr | Quantitative Determination of Sulfate in Hydrate and Water Systems by Raman Spectrometry |
| title_full_unstemmed | Quantitative Determination of Sulfate in Hydrate and Water Systems by Raman Spectrometry |
| title_short | Quantitative Determination of Sulfate in Hydrate and Water Systems by Raman Spectrometry |
| title_sort | quantitative determination of sulfate in hydrate and water systems by raman spectrometry |
| topic | nature gas hydrate sulfate raman spectrometry on-line quantitative determination |
| url | http://www.ykcs.ac.cn/en/article/id/47f0a32a-6741-4d8d-9863-1ad5778c313b |
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