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By Karl A D Swift

This e-book is a compilation of 16 of the twenty papers provided on the 2001 RSC/SCI flavours and fragrances convention at Scarman residence, collage of Warwick.

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This booklet is a compilation of 16 of the twenty papers awarded on the 2001 RSC/SCI flavours and fragrances convention at Scarman condominium, collage of Warwick.

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Chromatogr. and Chromatogr. Comm. 1989,12,317. 7. J. Pawliszyn, Solid Phase Microextraction, Theory and Principles, Wiley-VCH, New York, 1997. 38 Advances in Flavours and Fragrances 8. J. Pawliszyn, Applications of Solid Phase Microextraction, Royal Society of Chemistry, Hertfordshire, England, 1999. 9. E. -G. Janssen, P. A. Cramers, J. High Resolut. , 1997,20, 385 10. E. Baltussen, A. den Boer, P. -G. A. Cramers, Chromatographia 1999,49,520. 1 1 . E . Baltussen, F. David, P. -G. A. Cramers, Anal.

7. J. Pawliszyn, Solid Phase Microextraction, Theory and Principles, Wiley-VCH, New York, 1997. 38 Advances in Flavours and Fragrances 8. J. Pawliszyn, Applications of Solid Phase Microextraction, Royal Society of Chemistry, Hertfordshire, England, 1999. 9. E. -G. Janssen, P. A. Cramers, J. High Resolut. , 1997,20, 385 10. E. Baltussen, A. den Boer, P. -G. A. Cramers, Chromatographia 1999,49,520. 1 1 . E . Baltussen, F. David, P. -G. A. Cramers, Anal. , 1999 71, 5193. 12. E. Baltussen, P. Sandra, F.

Beer (25 ml) is poured in a headspace vial of 40 ml and 1 ml of 6 M HCl is added. A stir bar containing 25 p1 PDMS is introduced and the sample is stirred at 1500 rpm at 25°C for 60 minutes. The stir bar is dipped in bidistilled water and dried on a tissue paper. The stir bar is then placed in 2 ml of acetonitrile containing the internal standard ethylparaben at 8 mg/l and is stirred at 1500 rpm at 25°C for 60 minutes. 5 ml is taken and evaporated to dryness under a nitrogen stream. 5 ml bidistilled water and the sample is injected.

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