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Nonpolar organic compounds in fine particles: quantification by thermal desorption-GC/MS and evidence for their significant oxidation in ambient aerosols in Hong Kong
Yu, JZ (Yu, Jianzhen)[1,2]; Huang, XHH (Huang, X. H. Hilda)[1]; Ho, SSH (Ho, Steven S. H.)[2,3]; Bian, QJ (Bian, Qijing)[1]
2011-12-30
Source PublicationANALYTICAL AND BIOANALYTICAL CHEMISTRY
Volume401Issue:10Pages:3125-3139
Subtype期刊论文
Abstract

Nonpolar organic compounds (NPOCs) in ambient particulate matter (PM) commonly include n-alkanes, branched alkanes, hopanes and steranes, and polycyclic aromatic hydrocarbons (PAHs). The recent development of thermal desorption-gas chromatography/mass spectrometry (TD-GC/MS) has greatly reduced time and labor in their quantification by eliminating the laborious solvent extraction and sample concentration steps in the traditional approach that relies on solvent extraction. The simplicity of the TD-GCMS methods has afforded us concentration data of NPOCs in more than 90 aerosol samples in two aerosol field studies and 20 vehicular emissions-dominated source samples in Hong Kong over the past few years. In this work, we examine the interspecies relationships between select NPOCs and their concentration ratios to elemental carbon (EC) among the ambient samples and among the source samples. Our analysis indicates that hopanes were mainly from vehicular emissions and they were significantly oxidized in ambient PM. The hopane/EC ratio in ambient samples was on average less than half of the ratio in vehicular emissions-dominated source samples. This highlights the necessity in considering oxidation loss in applying organic tracer data in source apportionment studies. Select PAH/EC ratio-ratio plots reveal that PAHs had diverse sources and vehicular emissions were unlikely a dominant source for PAHs in Hong Kong. Biomass burning and other regional sources likely dominated ambient PAHs in Hong Kong.

KeywordOrganic aerosols Source apportionment Molecular tracers Atmospheric oxidation Carbonaceousaerosol Squalane
DOI10.1007/s00216-011-5458-5
Indexed BySCI
Language英语
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10337
Collection粉尘与环境研究室
Corresponding AuthorYu, JZ (Yu, Jianzhen)[1,2]
Affiliation1.Department of Chemistry,Hong Kong University of Science & Technology,Clear Water Bay, Kowloon,Hong Kong, China;
2.Division of Environment,Hong Kong University of Science & Technology,Clear Water Bay, Kowloon,Hong Kong, China;
3.SKLLQG, Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710075, China
Recommended Citation
GB/T 7714
Yu, JZ ,Huang, XHH ,Ho, SSH ,et al. Nonpolar organic compounds in fine particles: quantification by thermal desorption-GC/MS and evidence for their significant oxidation in ambient aerosols in Hong Kong[J]. ANALYTICAL AND BIOANALYTICAL CHEMISTRY,2011,401(10):3125-3139.
APA Yu, JZ ,Huang, XHH ,Ho, SSH ,&Bian, QJ .(2011).Nonpolar organic compounds in fine particles: quantification by thermal desorption-GC/MS and evidence for their significant oxidation in ambient aerosols in Hong Kong.ANALYTICAL AND BIOANALYTICAL CHEMISTRY,401(10),3125-3139.
MLA Yu, JZ ,et al."Nonpolar organic compounds in fine particles: quantification by thermal desorption-GC/MS and evidence for their significant oxidation in ambient aerosols in Hong Kong".ANALYTICAL AND BIOANALYTICAL CHEMISTRY 401.10(2011):3125-3139.
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