Document Detail


Determination of organic acids in aerosol particles from a coniferous forest by liquid chromatography-mass spectrometry.
MedLine Citation:
PMID:  15792248     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
LC-MS methods with use of ion-trap and time-of-flight mass spectrometers were developed for the determination of organic acids in aerosol samples collected by a high-volume sampler in a Finnish coniferous forest. Comparison was made of the composition of samples collected during atmospheric formation of new aerosol particles and on days when this formation did not occur. A dynamic sonication-assisted solvent extraction system was developed for fast and quantitative extraction of the filter samples. Several organic acids, including pinonic acid, pinic acid, and homologous series of n-alkanoic acids, n-alkenoic acids, and aliphatic dicarboxylic acids, were identified. In samples collected between 08:00 and 16:00 hours the concentration of pinonic acid ranged from 0.5 ng m(-3) to 3.7 ng m(-3) and that of pinic acid from 0.2 ng m(-3) to 1.5 ng m(-3). For most of the compounds identified, the trends in concentration could be explained by the differences in temperature during collection. However, concentrations of short-chain n-alkanoic acids were clearly higher on the days when new aerosol particle formation occurred.
Authors:
Piia Anttila; Tuulia Hyötyläinen; Anu Heikkilä; Matti Jussila; Johan Finell; Markku Kulmala; Marja-Liisa Riekkola
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of separation science     Volume:  28     ISSN:  1615-9306     ISO Abbreviation:  J Sep Sci     Publication Date:  2005 Mar 
Date Detail:
Created Date:  2005-03-28     Completed Date:  2006-07-25     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  101088554     Medline TA:  J Sep Sci     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  337-46     Citation Subset:  IM    
Affiliation:
laboratory of Analytical Chemistry, Department of Chemistry, P.O. Box 55, FIN-00014 University of Helsinki, Finland.
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MeSH Terms
Descriptor/Qualifier:
Acids / analysis*,  chemistry*
Aerosols / analysis*,  chemistry*
Chromatography, High Pressure Liquid
Mass Spectrometry
Organic Chemicals / chemistry*
Trees / chemistry*
Chemical
Reg. No./Substance:
0/Acids; 0/Aerosols; 0/Organic Chemicals

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