TY - JOUR T1 - Effect of Bentonite Fining on Polyfunctional Mercaptans and Other Volatile Compounds in Sauvignon blanc Wines JF - American Journal of Enology and Viticulture JO - Am J Enol Vitic. SP - 30 LP - 38 DO - 10.5344/ajev.2016.16052 VL - 68 IS - 1 AU - Eduardo Vela AU - Purificación Hernández-Orte AU - Eva Castro AU - Vicente Ferreira AU - Ricardo Lopez Y1 - 2017/01/01 UR - http://www.ajevonline.org/content/68/1/30.abstract N2 - Bentonite fining is the most common process used in the wine industry to remove proteins from wine. Herein, the influence of fermentative and post-fermentative fining on aroma compounds found in Sauvignon blanc wines was studied. Sauvignon blanc musts from different vintages were fined using bentonite. Conventional enological parameters, together with more than 60 volatile compounds, including varietal thiols, were determined in the bottled wines. The results showed that bentonite fining was more effective in removing proteins from wine when carried out on finished wines. Several volatile compounds were influenced by bentonite fining depending on the timing of addition and the vintage. Varietal thiols, key compounds of Sauvignon blanc wine aroma, were significantly reduced when the wines were fined with bentonite, particularly when fining took place during fermentation. Results suggest that bentonite fining of musts could damage the organoleptic quality and varietal character of Sauvignon blanc wines because of its impact on polyfunctional mercaptans. ER -