IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Preparation of high-precision CO2 with known triple oxygen isotope for oxygen isotope analysis
Sha, Lijuan1; Mahata, Sasadhar1; Duan, Pengzhen1; Zong, Baoyun1; Ning, Youfeng1; Zhang, Pu1; Wang, Jian1; Cai, Yanjun1; Cheng, Hai1,2,3
Corresponding AuthorSha, Lijuan(shalijuan@xjtu.edu.cn)
2021-08-12
Source PublicationISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES
ISSN1025-6016
Pages14
AbstractThe objective of this work is to propose a more effective way to prepare an in-house CO2 with known triple oxygen isotope compositions. The major experimental steps include: (1) the O-2 is combusted to CO2 on a graphite rod at 750 degrees C with Pt-catalyst for 3-4 min; and (2) converted CO2 is subsequently purified by two cryogenic traps. The results show high reproducibility of delta C-13 and delta O-18 values of the converted CO2 within 0.010-0.020 parts per thousand and 0.006-0.010 parts per thousand (1 sigma, SD), and the identical delta O-18 value within error with that of the original O-2. Additionally, we have measured the triple oxygen isotope compositions of converted CO2 using an O-2-CO2 Pt-catalyzed oxygen-isotope equilibration method. The measured delta O-17 values of CO2 show high reproducibility within 0.006 parts per thousand (1 sigma, SD), and are identical within error with the original O-2 as well. Notably, our experiments also found that the O-2 with heavier oxygen isotope ratios (delta O-18 > 40 parts per thousand, VSMOW) might have a lesser conversion efficiency, and this effect, combined with the lighter isotope preferential fractionations during the reaction processes of O-2 to CO and CO to CO2, may explain the observed lower O-17/O-16 and O-18/O-16 ratios of the converted CO2 relative to the original O-2.
KeywordTriple oxygen isotope combustion reaction Pt-catalyst carbon dioxide kinetic isotope effect oxygen-16 oxygen-18
DOI10.1080/10256016.2021.1962321
WOS KeywordCARBON-DIOXIDE ; O-18/O-16 RATIOS ; DELTA-O-17 ; O-17/O-16 ; FRACTIONATION ; O-2 ; O-17(EXCESS) ; STANDARDS ; ABUNDANCE ; MINERALS
Indexed BySCI ; SCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41561144003] ; National Natural Science Foundation of China[41731174] ; National Natural Science Foundation of China[41672165]
WOS Research AreaChemistry ; Environmental Sciences & Ecology
Funding OrganizationNational Natural Science Foundation of China
WOS SubjectChemistry, Inorganic & Nuclear ; Environmental Sciences
WOS IDWOS:000684436800001
PublisherTAYLOR & FRANCIS LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/16919
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorSha, Lijuan
Affiliation1.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China
3.CAGS, Key Lab Karst Dynam, MLR, Inst Karst Geol, Guilin, Peoples R China
Recommended Citation
GB/T 7714
Sha, Lijuan,Mahata, Sasadhar,Duan, Pengzhen,et al. Preparation of high-precision CO2 with known triple oxygen isotope for oxygen isotope analysis[J]. ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES,2021:14.
APA Sha, Lijuan.,Mahata, Sasadhar.,Duan, Pengzhen.,Zong, Baoyun.,Ning, Youfeng.,...&Cheng, Hai.(2021).Preparation of high-precision CO2 with known triple oxygen isotope for oxygen isotope analysis.ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES,14.
MLA Sha, Lijuan,et al."Preparation of high-precision CO2 with known triple oxygen isotope for oxygen isotope analysis".ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES (2021):14.
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