Substantial peak size effect on compound-specific delta D values analyzed on isotope ratio mass spectrometry

doi:10.1016/j.chemgeo.2022.120721

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	Substantial peak size effect on compound-specific delta D values analyzed on isotope ratio mass spectrometry
	Liu, Hu 1,2,3; Cao, Yunning 1,2; Hu, Jing 1,2; Liu, Zhonghui 1,4; Liu, Weiguo 1,2,5
通讯作者	Liu, Weiguo(liuwg@loess.llqg.ac.cn)
	2022-02-20
发表期刊	CHEMICAL GEOLOGY
ISSN	0009-2541
卷号	590 页码:7
摘要	Lipid compound-specific hydrogen isotopes (delta D) have been widely applied in studies of biogeochemistry and paleoclimatology. delta D values of lipid homologues with different chain lengths from a single analysis are often utilized together in order to make full use of the delta D information. However, this approach could be potentially impacted by the large analytical error due to the inappropriate amount injected for some homologues. Here, we systematically investigate compound-specific delta D deviations with varying contents injected on the isotope ratio mass spectrometry, expressed as amplitudes, using both lab working standards and natural samples. The n-alkane delta D values of lab working standards (mixed C-21, C-25, C-27, C-29, C-31, and C-33) could vary by 40 parts per thousand to 70 parts per thousand when the amplitudes of n-alkanes change from 0.5 V to 10 V. For natural samples (27 n-alkane and 77 fatty acid samples), we have made repeated analyses of the same samples with different homologues targeted for the optimum range. The measured delta D values are higher by 20 parts per thousand to 40 parts per thousand with the amplitudes lower than the optimum range, and lower by 10 parts per thousand to 20 parts per thousand with higher amplitudes. All the results consistently show higher delta D values with decreasing amplitudes, and larger deviations occurring in low amplitude range, implying that special caution should be taken with the delta D values measured at low amplitude range. We have attempted amplitude-based correction of lipid delta D values, however, this approach should be cautious owing to their large residual errors. Hence, delta D values of different homologues in the same samples have to be measured in separate analysis if they could not fall within the optimum range at the same time.
关键词	Hydrogen isotopes N-Alkanes Fatty acids Isotope ratio mass spectrometry
DOI	10.1016/j.chemgeo.2022.120721
关键词[WOS]	N-ALKANE DISTRIBUTIONS ; PLANT LEAF WAXES ; LIPID BIOMARKERS ; TERRESTRIAL PLANTS ; SUBMERGED PLANTS ; FATTY-ACIDS ; D/H RATIOS ; HYDROGEN ; SEDIMENTS ; VARIABILITY
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[42103018] ; National Natural Science Foundation of China[41573005] ; National Natural Science Foundation of China[41873008] ; National Basic Research Programme of China[2013CB955901] ; Key Programme of the Chinese Academy of Sciences[QYZDY-SSW-DQC001] ; Technology Development and Innovation Programme of Chinese Academy of Sciences[2022g111] ; State Key Laboratory of Loess and Quaternary Geology[SKLLQG1632]
WOS研究方向	Geochemistry & Geophysics
项目资助者	National Natural Science Foundation of China ; National Basic Research Programme of China ; Key Programme of the Chinese Academy of Sciences ; Technology Development and Innovation Programme of Chinese Academy of Sciences ; State Key Laboratory of Loess and Quaternary Geology
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000768009700012
出版者	ELSEVIER
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/361006/17590
专题	现代环境研究室第四纪科学与全球变化卓越创新中心
通讯作者	Liu, Weiguo
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 3.Xian Inst Innovat Earth Environm Res, Xian 710061, Peoples R China 4.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Hu,Cao, Yunning,Hu, Jing,et al. Substantial peak size effect on compound-specific delta D values analyzed on isotope ratio mass spectrometry[J]. CHEMICAL GEOLOGY,2022,590:7.
APA	Liu, Hu,Cao, Yunning,Hu, Jing,Liu, Zhonghui,&Liu, Weiguo.(2022).Substantial peak size effect on compound-specific delta D values analyzed on isotope ratio mass spectrometry.CHEMICAL GEOLOGY,590,7.
MLA	Liu, Hu,et al."Substantial peak size effect on compound-specific delta D values analyzed on isotope ratio mass spectrometry".CHEMICAL GEOLOGY 590(2022):7.