RT Journal Article SR Electronic T1 Gluconic Acid in California Wines JF American Journal of Enology and Viticulture JO Am J Enol Vitic. FD American Society for Enology and Viticulture SP 198 OP 201 DO 10.5344/ajev.1974.25.4.198 VO 25 IS 4 A1 Mccloskey, Leo P. YR 1974 UL http://www.ajevonline.org/content/25/4/198.abstract AB Seventy red and white California table wines, produced primarily by Northern California wineries, were assayed for gluconic acid by an enzymatic procedure. The levels of gluconate ranged from none to 3.09 g/L, averaging 0.21 g/L for reds and 0.24 g/L for the whites. Eight white Bordeaux wines, labeled `Sauternes,' also assayed for gluconic acid, contained 1.28-5.89 g/L. Preliminary evidence suggests that gluconate was present in the assayed wines as a result of mold metabolism prior to vinification.