The impacts of elevated temperature and mNaCl for in situ Raman quantitative calibration of dissolved gas species
文献类型：期刊论文
| 作者 | Li, Lianfu1,2,3 ; Zhang, Xin1,2,3,4; Luan, Zhendong1,2,3; Du, Zengfeng1,2; Xi, Shichuan1,2,4; Yan, Jun1,2
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| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2021-11-20 |
| 卷号 | 583页码:12 |
| 关键词 | Quantitative Raman spectroscopy CH4-NaCl-H2O In situ detection Hydrothermal vent fluid Fluid inclusion |
| ISSN号 | 0009-2541 |
| DOI | 10.1016/j.chemgeo.2021.120490 |
| 通讯作者 | Zhang, Xin(xzhang@qdio.ac.cn) |
| 英文摘要 | In the past ten years, Raman spectroscopy analysis has been widely applied to the quantification of the components of hydrothermal fluids and fluid inclusions. However, the accuracy of the quantitative results of Raman spectroscopy is highly dependent on the quantitative calibration model. How temperature and salinity affect quantitative calibration models remains an unsolved question, which severely hinders the accurate geochemical characterization of hydrothermal fluids and fluid inclusions. In this study, the Raman spectra of the symmetric stretching mode of methane (similar to 2917 cm(-1)) in homogeneous CH4-containing aqueous solutions were obtained at temperatures from 25 to 300 degrees C, pressures from 0.1 to 40 MPa, and mNaCl from 0 to 5.0 mol/kg to research the effects of elevated temperature and salinity on the Raman spectroscopy quantitative measurement of gas species, and two Raman calibration models of CH4 that reference OH bending and stretching bands were established. Both models show high dependence on salinity. Large measurement errors, causing underestimation of methane concentrations by up to 57.5%, occur if the salinity of the fluids is not taken into account during the calibration. The contributions of the Raman scattering cross section (RSCS) and molar density to the change of quantification factors (QFs) were quantified, and the results showed that the variation of the RSCS is the main factor determining QF values. The significant discrepancy between the measured and predicted QFs demonstrates that changes in the peak areas of both H2O and CH4 contribute to the dependence of quantitative calibration models on temperature and salinity. |
| 资助项目 | National Natural Science Foundation of China[41822604] ; National Natural Science Foundation of China[92058206] ; Strategic Priority Research Program, CAS[XDA19060402] ; Strategic Priority Research Program, CAS[XDA22050102] ; China Postdoctoral Science Foundation[2020M682245] ; Laboratory for Marine Geology, Qingdao Pilot National Laboratory for Marine Science and Technology[MGQNLM-TD201904] ; Young Taishan Scholars Program[tsqn201909158] ; Special Research Assistant Project of Chinese Academy of Sciences ; CAS Key Technology Talent Program |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000702309700026 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/176669]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 通讯作者 | Zhang, Xin |
| 作者单位 | 1.Chinese Acad Sci, CAS Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 3.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Geol, Qingdao 266061, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, 7 Nanhai Rd, Qingdao 266071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Lianfu,Zhang, Xin,Luan, Zhendong,et al. The impacts of elevated temperature and mNaCl for in situ Raman quantitative calibration of dissolved gas species[J]. CHEMICAL GEOLOGY,2021,583:12. |
| APA | Li, Lianfu,Zhang, Xin,Luan, Zhendong,Du, Zengfeng,Xi, Shichuan,&Yan, Jun.(2021).The impacts of elevated temperature and mNaCl for in situ Raman quantitative calibration of dissolved gas species.CHEMICAL GEOLOGY,583,12. |
| MLA | Li, Lianfu,et al."The impacts of elevated temperature and mNaCl for in situ Raman quantitative calibration of dissolved gas species".CHEMICAL GEOLOGY 583(2021):12. |
入库方式： OAI收割
来源：海洋研究所
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