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Chem. Anal. (Warsaw), 49, 869 (2004)

Determination of C3C10 Aliphatic Aldehydes Using PFBHA Derivatization and Solid Phase Microextraction (SPME). Application to the Analysis of Beer

by Henryk H. Jeleñ*1, Agata D¹browska2, Dorota Klensporf1, Jacek Nawrocki2 and Erwin W¹sowicz1

1

August Cieszkowski Agricultural University of Poznañ, Institute of Food Technology, ul. Wojska Polskiego 31, 60-624 Poznañ, Poland, 2 Adam Mickiewicz University of Poznañ, Department of Water Treatment Technology, Faculty of Chemistry, ul. Drzyma³y 24, 60-613 Poznañ, Poland aldehydes, derivatization methods, PFBHA, SPME, beer analysis

Key words:

In the present study the SPME on-fibre derivatization of C3C10 aldehydes with the use of PFBHA is presented. Various procedures for adsorption of PFBHA on SPME fibre were studied. Finally, headspace adsorption mode at 20°C was adopted. After saturation with PFBHA, the SPME fibre was exposed to aldehydes in the headspace, and extraction was performed for 20 min. This approach was compared to the in-solution derivatization with PFBHA and syringe injection of the solution of oximes. The former, however, occurred to be much more sensitive and allowed the aldehydes to be extracted from complex matrices. The developed method was applied to the analysis of C3C10 aldehydes in beer. They were determined at the level: 0.0783.20 µg L-1, depending on the type of aldehyde and the brand of beer.

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