Extinction efficiencies of mixed aerosols measured by aerosol cavity ring down spectrometry

doi:10.1007/s11434-012-5146-7

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	Extinction efficiencies of mixed aerosols measured by aerosol cavity ring down spectrometry
	Wang Lei; Wang WeiGang; Ge MaoFa
刊名	CHINESE SCIENCE BULLETIN
	2012-07-01
卷号	57 期号:20 页码:2567-2573
关键词	Cavity Ring Down Spectroscopy Optical Property Mixing Aerosols Mixing Rules
ISSN号	1001-6538
DOI	10.1007/s11434-012-5146-7
英文摘要	A cavity ring down spectroscopy instrument was introduced and designed for measuring extinction efficiencies of pure and mixing aerosols in this paper. Through averaging 500 individual waveforms, the minimal detectable aerosol extinction coefficient of 8.4 x 10(-7) m(-1) was achieved. By the test results using the NaCl particles, we concluded that this system could measure the extinction efficiencies of an aerosol with an uncertainty less than 3% under laboratory controlled experimental conditions. The refractive indices of different aerosols were retrieved through comparing the measured extinction efficiencies of each aerosol type with which predicted by Mie theory. Aerosols composed of ammonium sulphate and succinic acid with different weight ratios were used to create a model of mixed aerosols using these two materials, whose extinction efficiencies and complex refractive indices were derived. The refractive indices of the mixed aerosols were also calculated by various optical mixing rules. We found that all the molar refraction/absorption mixing rule, the volume ratio linear rule, and Maxwell-Garnett rule did provide comparable results, of which the volume ratio linear rule gave a slightly worse fit than the others.
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000305916000010
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/49199]
专题	中国科学院化学研究所
通讯作者	Ge MaoFa
作者单位	Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Struct Chem Unstable & Stable Speci, Inst Chem, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Wang Lei,Wang WeiGang,Ge MaoFa. Extinction efficiencies of mixed aerosols measured by aerosol cavity ring down spectrometry[J]. CHINESE SCIENCE BULLETIN,2012,57(20):2567-2573.
APA	Wang Lei,Wang WeiGang,&Ge MaoFa.(2012).Extinction efficiencies of mixed aerosols measured by aerosol cavity ring down spectrometry.CHINESE SCIENCE BULLETIN,57(20),2567-2573.
MLA	Wang Lei,et al."Extinction efficiencies of mixed aerosols measured by aerosol cavity ring down spectrometry".CHINESE SCIENCE BULLETIN 57.20(2012):2567-2573.