« Previous AbstractFlavour profiles of three novel acidic varieties of muskmelon (Cucumis melo L.)    Next AbstractDetermination of volatile and non-volatile products of milk fermentation processes using capillary zone electrophoresis and solid phase microextraction coupled to gas chromatography »

J Sep Sci

Title:		The comparison of solid phase microextraction-GC and static headspace-GC for determination of solvent residues in vegetable oils
Author(s):		Ligor M; Buszewski B;
Address:		"Chair of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Torun, Poland. mada@chem.uni.torun.pl"
Journal Title:		J Sep Sci
Year:		2008
Volume:		31
Issue:		2
Page Number:		364 - 371
DOI:		10.1002/jssc.200700303
ISSN/ISBN:		1615-9306 (Print) 1615-9306 (Linking)
Abstract:		"The objective of these investigations has been the determination of volatile organic compounds including residue solvents present in vegetable oil samples. Some olive oil, rape oil, sunflower oil, soy-bean oil, pumpkin oil, grape oil, rice oil as well as hazel-nut oil samples were analysed. Among residue solvents the following compounds have been mentioned: acetone, n-hexane, benzene, and toluene. Some experiments for the solid phase microextraction (SPME)-GC-flame ionisation detection (FID) were performed to examine extraction conditions such as fiber exposure time, temperature of extraction, and temperature of desorption. Various SPME fibers such as polydimethylsiloxane, Carboxen/polydimethylsiloxane and polydimethylsiloxane/divinylbenzene coatings were used for the isolation of tested compounds from vegetable oil samples. After optimisation of SPME, real vegetable oil samples were examined using SPME-GC/MS. Based on preliminary experiments the qualitative and quantitative analyses for the determination of acetone, n-hexane, benzene and toluene were performed by SPME-GC-FID and static head-space (SHS)-GC-FID methods. The regression coefficients for calibration curves for the examined compounds were R(2) > or = 0.992. This shows that the used method is linear in the examined concentration range (0.005-0.119 mg/kg for SPME-GC-FID and 0.003-0.728 mg/kg for SHS-GC-FID). Chemical properties of analysed vegetable oils have been characterised by chemometric procedure (cluster analysis)"
Keywords:		"Chromatography, Gas/*methods Plant Oils/*chemistry Sensitivity and Specificity Solvents/*chemistry Temperature;"
Notes:		"MedlineLigor, Magdalena Buszewski, Boguslaw eng Comparative Study Research Support, Non-U.S. Gov't Germany 2008/01/16 J Sep Sci. 2008 Feb; 31(2):364-71. doi: 10.1002/jssc.200700303"