Unexpected impact of 2-methylisoborneol as off-odour substance in aged wines
Language
EN
Article de revue
This item was published in
Food Chemistry. 2016-10-05, vol. 220, p. 498-504
English Abstract
Four Pinot noir wines from Burgundy were investigated by gas chromatography-olfactometry, with regard to the presence of earthy-smelling compounds. 2-Methylisoborneol (2-MIB) was detected in two of these wines, although ...Read more >
Four Pinot noir wines from Burgundy were investigated by gas chromatography-olfactometry, with regard to the presence of earthy-smelling compounds. 2-Methylisoborneol (2-MIB) was detected in two of these wines, although the samples were seven years old, contradicting previous reports that this substance is unstable in wine and must. In order to investigate this seemingly paradoxical situation, 2-MIB stability was reinvestigated in wine and in model solution starting with an elevated initial concentration. Although 2-MIB concentration greatly decreased during the 90 days of storage, the final concentration measured in both media was well above the odour threshold of the substance. Based on the observation of a decelerating decrease of 2-MIB with time, it was concluded that this substance can still be detected in wine and can induce, in this case, an earthy off-odour on condition that the start concentration is high enough.Read less <
English Keywords
off-odours
gas chromatography-olfactometry (GC-O)
2-Methyl-2-bornene
2-Methylenebornane
musty
mouldy
smell
aroma
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