Journal
JOURNAL OF SEPARATION SCIENCE
Volume 27, Issue 17-18, Pages 1540-1544Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.200301705
Keywords
solid-phase microextraction; gas chromatography-mass spectrometry; monoterpenes; honey
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Solid-phase microextraction (SPME) using a 100 mum poly(dimethylsiloxane) (PDMS) fiber, followed by gas chromatography (GC-MS) determination, has been applied to the analysis of some monoterpenoids in honey. The extraction was performed by direct immersion of the fiber using a sampling period of 15 min with constant magnetic stirring (1100 rpm) and an extraction temperature of 20degreesC. A 7 mL sample volume of an aqueous solution of honey with 25% of NaCl was placed in 15 mL glass vial fitted with screw cap and PTFE/silicone septum. Desorption was performed directly in the gas chromatograph injector port during 5 min at 250degreesC using the splitless mode. The method is sensitive with detection limits between 11 and 25 mug L-1, precise with coefficients of variation in the range 1.28 and 3.71%, and linear over more than one order of magnitude. The related conditions were used for honey sample analyses with recoveries between 71.8 and 90.9%. SPME remains an attractive alternative technique due to its rapidity and because it is a solvent free extraction method.
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