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New method for resolving the enantiomeric composition of 2-methyltetrols in atmospheric organic aerosols
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
KTH, Skolan för kemivetenskap (CHE), Kemi, Analytisk kemi.
Vise andre og tillknytning
2011 (engelsk)Inngår i: Journal of Chromatography A, ISSN 0021-9673, E-ISSN 1873-3778, Vol. 1218, nr 51, s. 9288-9294Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In order to facilitate the determination of the primary and secondary origin of atmospheric organic aerosols, a novel method involving chiral capillary gas chromatography coupled with mass spectrometry has been developed and validated. The method was focused on the analysis of 2-methylerythritol and 2-methylthreitol, considered to be tracers of secondary organic aerosols from the oxidation of atmospheric isoprene. The method was validated by performing various tests using authentic standards, including pure enantiomeric standards. The result showed that the analytical method itself does not affect the enantiomeric composition of the samples analyzed. The method was applied on atmospheric aerosols from a boreal forest collected in Aspvreten, Sweden and on laboratory samples obtained from liquid phase oxidation of isoprene and smog chamber experiments. Aerosol samples contained one enantiomer of 2-methylerythritol in significantly larger quantities than the others. In contrast, the liquid-phase oxidation of isoprene and its gas-phase oxidation in the smog chamber produced all enantiomers in equal quantities. The results obtained where the enantiomer fraction, EF, is larger than 0.50 suggest that 2-methyltetrols in atmospheric aerosols may also have biological origin. Information about the differences between enantiomer fractions obtained using this method brings new insights in the area of atmospheric aerosols.

sted, utgiver, år, opplag, sider
2011. Vol. 1218, nr 51, s. 9288-9294
Emneord [en]
Secondary Organic Aerosols, 2-Methylerythritol, 2-Methylthreitol, Chiral GC-MS, Isoprene
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-63244DOI: 10.1016/j.chroma.2011.10.069ISI: 000298530000021Scopus ID: 2-s2.0-82555186956OAI: oai:DiVA.org:kth-63244DiVA, id: diva2:484474
Forskningsfinansiär
Swedish Research Council
Merknad
QC 20120127Tilgjengelig fra: 2012-01-27 Laget: 2012-01-23 Sist oppdatert: 2017-12-08bibliografisk kontrollert

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Borg-Karlson, Anna-KarinPettersson Redeby, JohanPei, Yuxin
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