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

文献类型：期刊论文

作者Liu, Hu3,4,5; Cao, Yunning4,5; Hu, Jing4,5; Liu, Zhonghui2,5; Liu, Weiguo1,4,5
刊名CHEMICAL GEOLOGY
出版日期2022-02-20
卷号590页码:7
关键词Hydrogen isotopes N-Alkanes Fatty acids Isotope ratio mass spectrometry
ISSN号0009-2541
DOI10.1016/j.chemgeo.2022.120721
通讯作者Liu, Weiguo(liuwg@loess.llqg.ac.cn)
英文摘要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.
WOS关键词N-ALKANE DISTRIBUTIONS ; PLANT LEAF WAXES ; LIPID BIOMARKERS ; TERRESTRIAL PLANTS ; SUBMERGED PLANTS ; FATTY-ACIDS ; D/H RATIOS ; HYDROGEN ; SEDIMENTS ; VARIABILITY
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
语种英语
WOS记录号WOS:000768009700012
出版者ELSEVIER
资助机构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
源URL[http://ir.ieecas.cn/handle/361006/17589]  
专题地球环境研究所_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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China
3.Xian Inst Innovat Earth Environm Res, Xian 710061, Peoples R China
4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
5.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, 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.

入库方式： OAI收割

来源：地球环境研究所

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