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Solid-phase extraction of organic compounds in atmospheric aerosol particles collected with the particle-into-liquid sampler and analysis by liquid chromatography-mass spectrometry
Laboratory of Analytical Chemistry, Department of Chemistry, University of Helsinki, Finland.
Laboratory of Analytical Chemistry, Department of Chemistry, University of Helsinki, Finland.
Laboratory of Analytical Chemistry, Department of Chemistry, University of Helsinki, Finland.
Division of Atmospheric Sciences, Department of Physical Sciences, University of Helsinki, Finland.
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2010 (English)In: Talanta: The International Journal of Pure and Applied Analytical Chemistry, ISSN 0039-9140, E-ISSN 1873-3573, Vol. 80, no 3, p. 1170-1176Article in journal (Refereed) Published
Abstract [en]

Atmospheric aerosol particles, collected with the particle-into-liquid sampler at SMEARII station in Finland in mid-August 2007, were analysed for biogenic acids. The sample pretreatment method. comprising solid-phase extraction with anion exchange and hydrophilic-lipophilic balance materials, was optimized. Extraction efficiencies of solid-phase extraction from 10 and 20 ml samples were about 100%, with average relative standard deviation of 8.9%, in concentration range from 12.5 to 50 ng/ml of the acid. Extraction of aldehydes was less successful, with efficiencies from 69 to 163% and average 10% deviation. Pre-treated samples were analysed by reversed phase high performance liquid chromatography with ion trap mass spectrometric detection. Limits of detection achieved for organic acids with the analytical procedure developed ranged from 9 to 27 mu g/l of extracted sample, while limits of quantitation were from 31 to 90 mu g/l Oxidation with ozone was used for the preparation of the acid of beta-caryophyllene (beta-caryophyllinic acid), which was also studied in aerosol samples. MS(2) experiments were used to confirm the identification of trans-pinic, trans-pinonic and beta-caryophyllinic acids. Azelaic, hexadecanoic, cis-pinonic,and cis-and trans-pinic acids were quantitated in the samples with use of authentic standards, while the concentrations of trans-pinonic and beta-caryophyllinic acids were determined with cis-pinonic acid as surrogate. Also, the contribution of beta-caryophyllene oxidation products to aerosol organic carbon was evaluated. Aldehydes could not be analysed in real samples due to the insufficient extraction. The particle-into-liquid sampler proved to be suitable for the collection of aerosol particles for the elucidation of daily and diurnal variation of selected species. The optimized sample pretreatment, together with the analysis method, offer a promising approach for the study of aerosol chemical composition, where artifact formation is minimal and time resolution is good.

Place, publisher, year, edition, pages
Elsevier, 2010. Vol. 80, no 3, p. 1170-1176
Keywords [en]
Particle-into-liquid sampler; Aerosol; cis/trans-Pinonic acid; Solid-phase extraction; HPLC-MS; beta-Caryophyllene; Ozonolysis
National Category
Analytical Chemistry
Identifiers
URN: urn:nbn:se:oru:diva-65701DOI: 10.1016/j.talanta.2009.09.004ISI: 000273929900019PubMedID: 20006070Scopus ID: 2-s2.0-71649096384OAI: oai:DiVA.org:oru-65701DiVA, id: diva2:1189751
Note

Funding Agency:

Academy of Finland  1118615

Available from: 2018-03-12 Created: 2018-03-12 Last updated: 2018-03-13Bibliographically approved

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Hyötyläinen, Tuulia

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