期刊
TALANTA
卷 74, 期 1, 页码 91-103出版社
ELSEVIER
DOI: 10.1016/j.talanta.2007.05.037
关键词
honey; volatile compounds; solid-phase microextraction; GC-qMS
The volatile composition from four types of multifloral Portuguese (produced in Madeira Island) honeys was investigated by a suitable analytical procedure based on dynamic headspace solid-phase microextraction (HS-SPME) followed by thermal desorption gas chromatography-quadrupole mass spectrometry detection (GC-qMS). The performance of five commercially available SPME fibres: 100 mu m polydimethylsiloxane, PDMS; 85 mu m polyacrylate, PA; 50/30 mu m divinylbenzene/carboxen on polydimethylsiloxane, DVB/CAR/PDMS (StableFlex); 75 mu m carboxen/polydimethylsiloxane, CAR/PDMS, and 65 mu m carbowax/divinylbenzene, CW/DVB; were evaluated and compared. The highest amounts of extract, in terms of the maximum signal obtained for the total volatile composition, were obtained with a DVB/CAR/PDMS coating fibre at 60 degrees C during an extraction time of 40 min with a constant stirring at 750 rpm, after saturating the sample with NaCl (30%). Using this methodology more than one hundred volatile compounds, belonging to different biosynthetic pathways were identified, including monoterpenols, C-13-norisoprenoids, sesquiterpenes, higher alcohols, ethyl esters and fatty acids. The main components of the HS-SPME samples of honey were in average ethanol, hotrienol, benzeneacetaldehyde, furfural, trans-linalool oxide and 1,3-dihydroxy-2-propanone. (c) 2007 Elsevier B.V. All rights reserved.
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