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Comparison of Extraction Techniques and Mass Spectrometric Ionization Modes in the Analysis of Wine Volatile Carbonyls by Julián Zapata; Laura Mateo-Vivaracho; Juan Cacho; Vicente Ferreira is a Chemistry article available to read on EtoBox.

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This work presents a comparative study of the analytical characteristics of two methods for the analysis of carbonyl compounds in wine, both based on the derivatization with O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine hydrochloride (PFBHA). In the first method derivatives are formed in the solid phase extraction (SPE) cartridge in which the analytes have been previously isolated, while in the second method derivatives are formed in a solid phase microextraction (SPME) fibre saturated with vapors of the reagent and exposed to the sample headspace. In both cases detection has been carried out by electron impact (EI) or negative chemical ionization (NCI) mass spectrometry. The possibility of determining haloanisols simultaneously has been also considered. The method based on SPE presents, in general, better analytical properties than the SPME one. Although linearity was satisfactory for both methods (R(2)>0.99), repeatability of the SPE method (RSD<10%) was better than that obtained with SPME (9% < RSD < 20%). Detection limits obtained with EI are better for the SPE method except for trihaloanisols, while with NCI detection limits for both strategies are comparable, although the SPME

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Author

Julián Zapata; Laura Mateo-Vivaracho; Juan Cacho; Vicente Ferreira

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0003-2670)

Published

2010

Language

EN

Field

Chemistry (Physical Sciences)