Preparation of high-precision CO2 with known triple oxygen isotope for oxygen isotope analysis
文献类型：期刊论文
| 作者 | Sha, Lijuan1; Mahata, Sasadhar1; Duan, Pengzhen1; Zong, Baoyun1; Ning, Youfeng1; Zhang, Pu1; Wang, Jian1; Cai, Yanjun1; Cheng, Hai1,2,3 |
| 刊名 | ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES
 |
| 出版日期 | 2021-08-12 |
| 页码 | 14 |
| 关键词 | Triple oxygen isotope combustion reaction Pt-catalyst carbon dioxide kinetic isotope effect oxygen-16 oxygen-18 |
| ISSN号 | 1025-6016 |
| DOI | 10.1080/10256016.2021.1962321 |
| 通讯作者 | Sha, Lijuan(shalijuan@xjtu.edu.cn) |
| 英文摘要 | 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. |
| WOS关键词 | CARBON-DIOXIDE ; O-18/O-16 RATIOS ; DELTA-O-17 ; O-17/O-16 ; FRACTIONATION ; O-2 ; O-17(EXCESS) ; STANDARDS ; ABUNDANCE ; MINERALS |
| 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:000684436800001 |
| 出版者 | TAYLOR & FRANCIS LTD |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.ieecas.cn/handle/361006/16918]  |
| 专题 | 地球环境研究所_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. |
入库方式： OAI收割
来源：地球环境研究所
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