Functional group analysis of high-molecular weight compounds in the water-soluble fraction of organic aerosols

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Author(s) Samburova, Vera, Didenko, Tatiana, Kunenkov, Erast, Emmenegger, Christian, Zenobi, Renato, Kalberer, Markus
Publication Type Journal Items, Publication Status: Published
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Title Functional group analysis of high-molecular weight compounds in the water-soluble fraction of organic aerosols
Author(s) Samburova, Vera
Didenko, Tatiana
Kunenkov, Erast
Emmenegger, Christian
Zenobi, Renato
Kalberer, Markus
Journal or Series Title Atmospheric environment
Volume Number 41
Issue Number 22
Start Page 4703
End Page 4710
ISSN 1352-2310
0004-6981
Publisher Elsevier
Publication Place Amsterdam
Publication Date 2007
Keyword(s) organic aerosol
HULIS
functional group analysis
H-NMR
titration
Abstract In this study, we present the analysis of functional groups of humic-like substances (HULIS) isolated from atmospheric aerosols (<1 μm). Aerosol samples were collected in an urban area (Dübendorf, Switzerland) both in summer and winter. Quantification of carboxylic, arylic, phenolic and aliphatic functional groups of HULIS was performed by a specially adapted and optimized H-NMR method. The concentrations of carboxylic, arylic, phenolic and aliphatic functional groups were between 9×10−11 and 6×10−8 mol/m3 for all samples, corresponding up to 14% of the total HULIS mass. A good correlation between the H-NMR results and the potentiometric titration of carboxylic groups was observed for all winter and summer samples. The pK distributions of carboxylic groups of HULIS were calculated from potentiometric titration data. pK spectra showed that pK values of most carboxylic groups is between 3 and 5. The H-NMR data show that the content of aromatic groups is higher in winter than in summer. This may either be due to emission of aromatic compounds by wood burning or to slower degradation reaction of aromatics in winter.
DOI 10.1016/j.atmosenv.2007.03.033
Additional Notes Received 22 December 2006, Revised 13 March 2007, Accepted 19 March 2007, Available online 28 March 2007
Document Type Article
Publication Status Published
Language English
Assigned Organisational Unit(s) 03430
Organisational Unit(s)
NEBIS System Number 002060155
Source Database ID PP-34140
WOS-000247769100012
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@article{Smbrv2007,
  author = "Samburova, Vera and Didenko, Tatiana and Kunenkov, Erast and Emmenegger, Christian and Zenobi, Renato and Kalberer, Markus",
  title = "{F}unctional group analysis of high-molecular weight compounds in the water-soluble fraction of organic aerosols",
  journal = "Atmospheric environment",
  year = 2007,
  volume = "41",
  number = "22",
  pages = "4703--4710",
}


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