General analysis of Koshu-Nouveau wines produced in Yamanashi prefecture [Japan] in 1995
1996
Yamakawa, Y. (Yamanashi Univ., Kofu (Japan). Faculty of Engineering)
Thirty-nine bottles of Koshu-nouveau wines produced in 1995 by various wineries located in Yamanashi prefecture, Japan, were analyzed to determine the general constituents of the wines. Alcohol content in the wines averaged 10.8 vol.%. The average alcohol content has become lower year by year, and some wines in the 1995 vintage were found to have an alcohol content of less than 10 vol.%. ON the other hand, the extract in the 1995 wines averaged 5.05g/100ml, and has become higher year by year, although the minimum values have become lower. Average pH and total acidity were influenced by the meteorological conditions during the respective growing seasons. Total SO2 content of the 1995 wines averaged 105 mg/l. Bottles were also examined with respect to type and color. The various wineries used mainly colorless or emerald-green Bordeaux-type bottles
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