Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1399, Issue -, Pages 18-24Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2015.04.041
Keywords
Monoterpenes; Honey; Headspace sorptive extraction (HSSE); Gas chromatography-mass spectrometry (GC-MS)
Funding
- Comunidad Autonoma de la Region de Murcia (CARM, Fundacion Seneca) [15217/PI/10]
- University of Murcia
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Headspace sorptive extraction (HSSE) was used to preconcentrate seven monoterpenes (eucalyptol, linalool, menthol, geraniol, carvacrol, thymol and eugenol) for separation by gas chromatography and mass spectrometry (GC-MS). Three commercially available coatings for the stir bars, namely Polydimethylsiloxane (PDMS), polyacrilate (PA) and Ethylene glycol-silicone (EG-Silicone), were tested, and the influential parameters both in the adsorption and the thermal desorption steps were optimized. PDMS provided the best sensitivity for linalool, geraniol, menthol and eucalyptol, whereas EG-Silicone was best for extracting the phenolic monoterpenes studied. Considering the average obtained slopes from all compounds, PDMS pointed as the best option, and the analytical characteristics for the HSSE-TD-GC-MS method using this coating were obtained. Quantification of the samples was carried out by matrix-matched calibration using a synthetic honey. Detection limits ranged between 0.007 and 0.032 ng g(-1), depending on the compound. Twelve honey samples of different floral origins were analyzed using the HSSE-GC-MS method, the analytes being detected at concentrations up to 64 ng g(-1). (C) 2015 Elsevier B.V. All rights reserved.
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