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Molecules

Title:		Correlating Sensory Assessment of Smoke-Tainted Wines with Inter-Laboratory Study Consensus Values for Volatile Phenols
Author(s):		Favell JW; Wilkinson KL; Zigg I; Lyons SM; Ristic R; Puglisi CJ; Wilkes E; Taylor R; Kelly D; Howell G; McKay M; Mokwena L; Plozza T; Zhang P; Bui A; Porter I; Frederick O; Karasek J; Szeto C; Pan BS; Tallman S; McClure BA; Feng H; Herve E; Oberholster A; Zandberg WF; Noestheden M;
Address:		"Department of Chemistry, The University of British Columbia, Kelowna, BC V1V 1V7, Canada. Department of Wine Science, Waite Research Institute, The University of Adelaide, PMB 1, Glen Osmond, SA 5064, Australia. The Australian Research Council Training Centre for Innovative Wine Production, Glen Osmond, SA 5064, Australia. Supra Research and Development, Kelowna, BC V1X 6Y5, Canada. The Australian Wine Research Institute, P.O. Box 197, Glen Osmond, SA 5064, Australia. Vintessential Laboratories, Dromana, VIC 3936, Australia. Department of Viticulture and Oenology/Central Analytical Facility, Stellenbosch University, Stellenbosch 7600, South Africa. Agriculture Victoria, Bundoora, VIC 3083, Australia. School of Life Sciences, LaTrobe University, Bundoora, VIC 3083, Australia. Enartis Vinquiry, Windsor, CA 95492, USA. E. & J. Gallo Winery, Modesto, CA 95354, USA. ETS Laboratories, St Helena, CA 94574, USA. Department of Viticulture and Enology, University of California Davis, Davis, CA 95616, USA"
Journal Title:		Molecules
Year:		2022
Volume:		20220730
Issue:		15
Page Number:		-
DOI:		10.3390/molecules27154892
ISSN/ISBN:		1420-3049 (Electronic) 1420-3049 (Linking)
Abstract:		"Vineyard exposure to wildfire smoke can taint grapes and wine. To understand the impact of this taint, it is imperative that the analytical methods used are accurate and precise. This study compared the variance across nine commercial and research laboratories following quantitative analysis of the same set of smoke-tainted wines. In parallel, correlations between the interlaboratory consensus values for smoke-taint markers and sensory analyses of the same smoke-tainted wines were evaluated. For free guaiacol, the mean accuracy was 94 +/- 11% in model wine, while the free cresols and 4-methylguaiacol showed a negative bias and/or decreased precision relative to guaiacol. Similar trends were observed in smoke-tainted wines, with the cresols and glycosidically bound markers demonstrating high variance. Collectively, the interlaboratory results show that data from a single laboratory can be used quantitatively to understand smoke-taint. Results from different laboratories, however, should not be directly compared due to the high variance between study participants. Correlations between consensus compositional data and sensory evaluations suggest the risk of perceivable smoke-taint can be predicted from free cresol concentrations, overcoming limitations associated with the occurrence of some volatile phenols, guaiacol in particular, as natural constituents of some grape cultivars and of the oak used for barrel maturation"
Keywords:		Consensus Cresols/metabolism Guaiacol/analysis Humans Phenols/analysis Smoke/analysis *Vitis/metabolism *Volatile Organic Compounds/analysis *Wine/analysis fire gas chromatography-mass spectrometry grapes inter-laboratory study rate-all-that-apply smoke s;
Notes:		"MedlineFavell, James W Wilkinson, Kerry L Zigg, Ieva Lyons, Sarah M Ristic, Renata Puglisi, Carolyn J Wilkes, Eric Taylor, Randell Kelly, Duane Howell, Greg McKay, Marianne Mokwena, Lucky Plozza, Tim Zhang, Pei Bui, AnhDuyen Porter, Ian Frederick, Orrin Karasek, Jasha Szeto, Colleen Pan, Bruce S Tallman, Steve McClure, Beth Anne Feng, Hui Herve, Eric Oberholster, Anita Zandberg, Wesley F Noestheden, Matthew eng Eminence Program/The University of British Columbia/ Undergraduate Student Research Award/Natural Sciences and Engineering Research Council/ NA/Wine Australia/ IC170100008/Australian Research Council Training Centre for Innovative Wine Production/ Switzerland 2022/08/13 Molecules. 2022 Jul 30; 27(15):4892. doi: 10.3390/molecules27154892"