An automated method for thermal-optical separation of aerosol organic/elemental carbon for C-13 analysis at the sub-mu gC level: A comprehensive assessment

doi:10.1016/j.scitotenv.2021.150031

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	An automated method for thermal-optical separation of aerosol organic/elemental carbon for C-13 analysis at the sub-mu gC level: A comprehensive assessment
	Yao, Peng 1; Ni, Haiyan 1,2; Paul, Dipayan 1; Masalaite, Agne 3; Huang, Ru-Jin 2; Meijer, Harro A. J.1; Dusek, Ulrike 1
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2022-01-15
卷号	804 页码:10
关键词	Elemental carbon C-13 analysis Automated method Pyrolysis Isotope fractionation
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2021.150031
通讯作者	Huang, Ru-Jin(rujin.huang@ieecas.cn) ; Dusek, Ulrike(u.dusek@rug.nl)
英文摘要	We describe and thoroughly evaluate a method for C-13 analysis in different fractions of carbonaceous aerosols, especially elemental carbon (EC). This method combines a Sunset thermal-optical analyzer and an isotope ratio mass spectrometer (IRMS) via a custom-built automated separation, purification, and injection system. Organic carbon (OC), EC, and other specific fractions from aerosol filter samples can be separated and analyzed automatically for C-13 based on thermal-optical protocols (EUSAAR_2 in this study) at sub-pgC levels. The main challenges in isolating EC for C-13 analysis are the possible artifacts during OC/EC separation, including the premature loss of EC and the formation of pyrolyzed OC (pOC) that is difficult to separate from EC. Since those artifacts can be accompanied with isotope fractionation, their influence on the stable isotopic composition of EC was comprehensively investigated with various test compounds. The results show that the thermal-optical method is relatively successful in OC/EC separation for C-13 analysis. The method was further tested on real aerosols samples. For biomass-burning source samples, (partial) inclusion of pOC into CC has negligible influence on the C-13 signature of CC. However, for ambient samples, the influence of pOC on the C-13 signature of CC can be significant, if it is not well separated from CC, which is true for many current methods for measuring C-13 on EC. A case study in Xi'an, China, where pOC is enriched in C-13 compared to EC, shows that this can lead to an overestimate of coal and an underestimate of traffic emissions in isotope-based source apportionment. (C) 2021 Elsevier B.V. All rights reserved.
资助项目	National Key Research and Development Program of China[2017YFC0212701] ; program of China Scholarships Council[201806320346]
WOS关键词	SECONDARY ORGANIC AEROSOL ; SOURCE APPORTIONMENT ; ELEMENTAL CARBON ; BLACK CARBON ; ATMOSPHERIC AEROSOLS ; PARTICULATE MATTER ; ISOTOPE RATIOS ; BROWN CARBON ; HAZE EVENTS ; RADIOCARBON
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000701855500003
资助机构	National Key Research and Development Program of China ; program of China Scholarships Council
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/17091]
专题	地球环境研究所_粉尘与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	Huang, Ru-Jin; Dusek, Ulrike
作者单位	1.Univ Groningen, Ctr Isotope Res CIO, Energy & Sustainabil Res Inst Groningen ESRIG, NL-9747 AG Groningen, Netherlands 2.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Inst Earth Environm, State Key Lab Loess & Quaternary Geol,Key Lab Aer, Xian 710061, Peoples R China 3.State Res Inst Ctr Phys Sci & Technol, Vilnius, Lithuania
推荐引用方式 GB/T 7714	Yao, Peng,Ni, Haiyan,Paul, Dipayan,et al. An automated method for thermal-optical separation of aerosol organic/elemental carbon for C-13 analysis at the sub-mu gC level: A comprehensive assessment[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,804:10.
APA	Yao, Peng.,Ni, Haiyan.,Paul, Dipayan.,Masalaite, Agne.,Huang, Ru-Jin.,...&Dusek, Ulrike.(2022).An automated method for thermal-optical separation of aerosol organic/elemental carbon for C-13 analysis at the sub-mu gC level: A comprehensive assessment.SCIENCE OF THE TOTAL ENVIRONMENT,804,10.
MLA	Yao, Peng,et al."An automated method for thermal-optical separation of aerosol organic/elemental carbon for C-13 analysis at the sub-mu gC level: A comprehensive assessment".SCIENCE OF THE TOTAL ENVIRONMENT 804(2022):10.