Preparation of high-precision CO2 with known triple oxygen isotope for oxygen isotope analysis

doi:10.1080/10256016.2021.1962321

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, Lijuan 1; Mahata, Sasadhar 1; Duan, Pengzhen 1; Zong, Baoyun 1; Ning, Youfeng 1; Zhang, Pu 1; Wang, Jian 1; Cai, Yanjun 1; Cheng, Hai 1,2,3
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	被引频次：3[WOS] [WOS记录] [WOS相关记录]
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.