Acids in wine responsible for the sour taste of vinegar. During fermentation, activity by yeast cells naturally produces a small amount of acetic acid. If the wine is exposed to oxygen, "Acetobacter" bacteria will convert the ethanol into acetic acid. This process is known as the “acetification” of wine and is the primary process behind wine degradation into vinegar. An excessive amount of acetic acid is also considered a wine fault. A taster's sensitivity to acetic acid will vary, but most people can detect excessive amounts at around 600 mg/l. Ascorbic acid, also known as vitamin C, is found in young wine grapes
History of French wine continuing link funneling the wines of Bordeaux and La Rochelle into England. The town of Middelburg earned a reputation across Europe as a center for trade of French wine. Dutch interest in the wine trade prompted advancement in winemaking styles and technology. One problem that plagued the French wine trade was the perishability of wine which rarely survived longer than the next vintage. French wine during this period was often unbalanced and unstable, being not properly clarified during wine making and lacking the alcohol needed to preserve the wine. This was of concern to the Dutch who would sometimes be