Knowledge Management System Of Institute of Earth Environment, CAS
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 | |
通讯作者 | Sha, Lijuan(shalijuan@xjtu.edu.cn) |
2021-08-12 | |
发表期刊 | ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES |
ISSN | 1025-6016 |
页码 | 14 |
摘要 | The 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. |
关键词 | Triple oxygen isotope combustion reaction Pt-catalyst carbon dioxide kinetic isotope effect oxygen-16 oxygen-18 |
DOI | 10.1080/10256016.2021.1962321 |
关键词[WOS] | CARBON-DIOXIDE ; O-18/O-16 RATIOS ; DELTA-O-17 ; O-17/O-16 ; FRACTIONATION ; O-2 ; O-17(EXCESS) ; STANDARDS ; ABUNDANCE ; MINERALS |
收录类别 | SCI ; SCI |
语种 | 英语 |
资助项目 | National 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研究方向 | Chemistry ; Environmental Sciences & Ecology |
项目资助者 | National Natural Science Foundation of China |
WOS类目 | Chemistry, Inorganic & Nuclear ; Environmental Sciences |
WOS记录号 | WOS:000684436800001 |
出版者 | TAYLOR & FRANCIS LTD |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/16919 |
专题 | 黄土与第四纪地质国家重点实验室(2010~) |
通讯作者 | Sha, Lijuan |
作者单位 | 1.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 |
推荐引用方式 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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