IOCAS-IR  > 海洋地质与环境重点实验室
The impacts of elevated temperature and mNaCl for in situ Raman quantitative calibration of dissolved gas species
Li, Lianfu1,2,3; Zhang, Xin1,2,3,4; Luan, Zhendong1,2,3; Du, Zengfeng1,2; Xi, Shichuan1,2,4; Yan, Jun1,2
2021-11-20
Source PublicationCHEMICAL GEOLOGY
ISSN0009-2541
Volume583Pages:12
Corresponding AuthorZhang, Xin(xzhang@qdio.ac.cn)
AbstractIn 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.
KeywordQuantitative Raman spectroscopy CH4-NaCl-H2O In situ detection Hydrothermal vent fluid Fluid inclusion
DOI10.1016/j.chemgeo.2021.120490
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000702309700026
PublisherELSEVIER
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/176670
Collection海洋地质与环境重点实验室
Corresponding AuthorZhang, Xin
Affiliation1.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
First Author AffilicationChinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res
Corresponding Author AffilicationChinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res
Recommended Citation
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.
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