气候变化领域集成服务门户(CCPortal): Technical note: Measurement of chemically resolved volume equivalent diameter and effective density of particles by AAC-SPAMS

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DOI	10.5194/acp-21-5605-2021
	Technical note: Measurement of chemically resolved volume equivalent diameter and effective density of particles by AAC-SPAMS
	Peng L.; Li L.; Zhang G.; Du X.; Wang X.; Peng P.; Sheng G.; Bi X.
发表日期	2021
ISSN	1680-7316
起始页码	5605
结束页码	5613
卷号	21 期号:7
英文摘要	Size and effective density (ρe) are important properties of aerosol particles and are related to their influences on human health and the global climate. The volume equivalent diameter (Dve) is an intrinsic property that is used to evaluate particle size. Three definitions of ρeare generally used to characterize the physical property of a particle as an alternative to particle density, in which only the ρIIe, defined as the ratio of particle density (ρp) to a dynamic shape factor (X), has the characteristic of being independent of particle size. However, it is still challenging to simultaneously characterize the Dve and ρII e of aspherical particles. Here, we present a novel system that classifies particles with their aerodynamic diameter (Da) by aerodynamic aerosol classifier (AAC) and determines their vacuum aerodynamic diameter (Dva) by single-particle aerosol mass spectrometry (SPAMS) to achieve a measurement of Dve and ρIIe. The reliability of the AAC-SPAMS system for accurately obtaining Dve and ρIIeis verified based on the result that the deviation between the measured and theoretical values is less than 6% for the size-resolved spherical polystyrene latex (PSL). The AACSPAMS system was applied to characterize the Dve and ρIIeof (NH4)2SO4and NaNO3particles, suggesting that these particles are aspherical and their ρIIeis independent of particle size. Finally, the AAC-SPAMS system was deployed in a field measurement, showing that it is a powerful technique to characterize the chemically resolved Dve and ρIIeof particles in real time. © 2021 EDP Sciences. All rights reserved.
语种	英语
scopus关键词	aerodynamics; density; diameter; mass spectrometry; particle size; particulate matter; physical property
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/246981
作者单位	State Key Lab. of Organ. Geochem. and Guangdong Prov. Key Lab. of Environ. Protect. and Rsrc. Utiliz., Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou, 510640, China; Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou, 510632, China
推荐引用方式 GB/T 7714	Peng L.,Li L.,Zhang G.,et al. Technical note: Measurement of chemically resolved volume equivalent diameter and effective density of particles by AAC-SPAMS[J],2021,21(7).
APA	Peng L..,Li L..,Zhang G..,Du X..,Wang X..,...&Bi X..(2021).Technical note: Measurement of chemically resolved volume equivalent diameter and effective density of particles by AAC-SPAMS.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(7).
MLA	Peng L.,et al."Technical note: Measurement of chemically resolved volume equivalent diameter and effective density of particles by AAC-SPAMS".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.7(2021).