气候变化领域集成服务门户(CCPortal): Measurements of higher alkanes using NO+ chemical ionization in PTR-ToF-MS: Important contributions of higher alkanes to secondary organic aerosols in China

CCPortal

DOI	10.5194/acp-20-14123-2020
	Measurements of higher alkanes using NO+ chemical ionization in PTR-ToF-MS: Important contributions of higher alkanes to secondary organic aerosols in China
	Wang C.; Yuan B.; Wu C.; Wang S.; Qi J.; Wang B.; Wang Z.; Hu W.; Chen W.; Ye C.; Wang W.; Sun Y.; Wang C.; Huang S.; Song W.; Wang X.; Yang S.; Zhang S.; Xu W.; Ma N.; Zhang Z.; Jiang B.; Su H.; Cheng Y.; Wang X.; Shao M.
发表日期	2020
ISSN	16807316
起始页码	14123
结束页码	14138
卷号	20 期号:22
英文摘要	Higher alkanes are a major class of intermediate-volatility organic compounds (IVOCs), which have been proposed to be important precursors of secondary organic aerosols (SOA) in the atmosphere. Accurate estimation of SOA from higher alkanes and their oxidation processes in the atmosphere is limited, partially due to the difficulty of their measurement. High-time-resolution (10s) measurements of higher alkanes were performed using NO+ chemical ionization in proton transfer reaction time-of-flight mass spectrometry (NO+ PTR-ToF-MS) at an urban site in Guangzhou in the Pearl River Delta (PRD) and at a rural site in the North China Plain (NCP). High concentrations were observed in both environments, with significant diurnal variations. At both sites, SOA production from higher alkanes is estimated from their photochemical losses and SOA yields. Higher alkanes account for significant fractions of SOA formation at the two sites, with average contributions of 7.0%±8.0% in Guangzhou and 9.4%±9.1% in NCP, which are comparable to or even higher than both single-ring aromatics and naphthalenes. The significant contributions of higher alkanes to SOA formation suggests that they should be explicitly included in current models for SOA formation. Our work also highlights the importance of NO+ PTR-ToF-MS in measuring higher alkanes and quantifying their contributions to SOA formation. © 2020 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	accuracy assessment; aerosol composition; alkane; ionic composition; nitrogen oxides; oxidation; reaction rate; volatile organic compound; China; Guangdong; North China Plain; Zhujiang Delta
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/152807
作者单位	Institute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, China; Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Guangzhou, 511443, China; School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, China; State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; State Joint Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China; State Key Laboratory of Atmospheric Boundary Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; State Key Laboratory of Severe Weather, Key Laboratory for Atmospheric Chemistry of China Meteorology Administrat...
推荐引用方式 GB/T 7714	Wang C.,Yuan B.,Wu C.,et al. Measurements of higher alkanes using NO+ chemical ionization in PTR-ToF-MS: Important contributions of higher alkanes to secondary organic aerosols in China[J],2020,20(22).
APA	Wang C..,Yuan B..,Wu C..,Wang S..,Qi J..,...&Shao M..(2020).Measurements of higher alkanes using NO+ chemical ionization in PTR-ToF-MS: Important contributions of higher alkanes to secondary organic aerosols in China.Atmospheric Chemistry and Physics,20(22).
MLA	Wang C.,et al."Measurements of higher alkanes using NO+ chemical ionization in PTR-ToF-MS: Important contributions of higher alkanes to secondary organic aerosols in China".Atmospheric Chemistry and Physics 20.22(2020).