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Type: Journal article
Title: Determination of oak lactones in barrel-aged wines and in oak extracts by stable isotope dilution analysis
Author: Pollnitz, A.
Jones, G.
Sefton, M.
Citation: Journal of Chromatography A, 1999; 857(1-2):239-246
Issue Date: 1999
ISSN: 0021-9673
Statement of
Alan P Pollnitz, Graham P Jones, Mark A Sefton
Abstract: The cis- and trans-isomers of 5-butyl-4-methyl-4,5-dihydro-2(3H)-furanone, the so-called oak lactones, are derived from oakwood, and the cis-isomer is an important contributor to wine flavour. Their deuterium-labelled forms, [2H4]cis-oak lactone and [2H4]trans-oak lactone, were synthesised from the unlabelled analogues, and were utilised in a new method employing gas chromatography-mass spectrometry to determine the concentration of these compounds in wine or extracts of oak shavings in a single analysis. The method can employ either liquid-liquid extraction or solid-phase microextraction, and is both rapid and accurate. There was some artefactual generation of cis-oak lactone during the analysis of model wine extracts of unheated oak shavings when diethyl ether extraction and injector block temperatures at or above 225 degrees C were employed.
Keywords: Wood; Wine; Food analysis; Butylmethyldihydrofuranones; Oak lactones
Rights: © 1999 Elsevier Science B.V. All rights reserved.
RMID: 0030003809
DOI: 10.1016/S0021-9673(99)00785-2
Appears in Collections:Wine Science publications

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