Journal of Agricultural and Food Chemistry 2002-10-09

Method for determining nitrogenous heterocycle compounds in wine.

Harald Keim, Gilles de Revel, Stéphanie Marchand, Alain Bertrand

Index: J. Agric. Food Chem. 50(21) , 5803-7, (2002)

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Abstract

Qualitative and quantitative analyses of N-heterocycle compounds were conducted by using a liquid-liquid extraction followed by additional chemical silica gel purification and injection into a gas chromatographic (GC) column coupled to a nitrogen-phosphorus detector (NPD). The purified extract fraction was investigated by GC-NPD and by GC-mass spectrometry. The compounds identified and quantified in wines were 2,4,5-trimethyloxazole, 2,4-dimethylthiazole, and 4-methylthiazole by GC-NPD and both 2-acetylthiazole and 2-acetyl-2-thiazoline by GC-MS. The procedure was used to analyze different wines and gave reliable and reproducible results.