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| Titel |
Quantitative and enantioselective analysis of monoterpenes from plant chambers and in ambient air using SPME |
| VerfasserIn |
N. Yassaa, T. Custer, W. Song, F. Pech, J. Kesselmeier, J. Williams |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 3, no. 6 ; Nr. 3, no. 6 (2010-11-23), S.1615-1627 |
| Datensatznummer |
250001364
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| Publikation (Nr.) |
 copernicus.org/amt-3-1615-2010.pdf |
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| Zusammenfassung |
| A headspace solid-phase microextraction (HS-SPME) and gas
chromatography/mass spectrometry (GC/MS) system has been developed for
quantifying enantiomeric and nonenantiomeric monoterpenes in plant chamber
studies and ambient air. Performance of this system was checked using a
capillary diffusion system to produce monoterpene standards. The adsorption
efficiency, competitive adsorption and chromatographic peak resolution of
monoterpene enantiomer pairs were compared for three SPME fibre coatings: 75 μm
Carboxen-PDMS (CAR-PDMS), 50/30 μm
divinylbenzene-carboxen-polydimethylsiloxane (DVB-CAR-PDMS) and 65 μm
divinylbenzene-polydimethylsiloxane (DVB-PDMS). Key parameters such as the
linearity and reproducibility of the SPME system have been investigated in
this work. The best compromise between the enantiomeric separation of
monoterpenes and competitive adsorption of the isoprenoids on the solid SPME
fibre coating was found for DVB-PDMS fibres. The optimum conditions using
DVB-PDMS fibres were applied to measure the exchange rates of monoterpenes
in the emission of Quercus ilex using a laboratory whole plant enclosure under light and
dark conditions, as well as in ambient air. With 592 and 223 ng m−2 s−1
respectively, β-myrcene and limonene were the predominant
monoterpenes in the emission of Q. ilex. These values were closely
comparable to those obtained using a zNose and cartridge GC-FID systems. |
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