浓香型瓶装酒库存过程中理化指标的变化

经过对1996年及1999年灌装的种子牌系列浓香型白酒的理化指标检测，发现在贮存过程中理化指标变化很大，总酸，固形物呈上升趋势，总酯，己酸乙酯呈下降趋势,其升降幅度与贮存时间相关，时间越长变化越大，贮存3年的高低度5个样平均总酸上升18．2％，28度样总酸上升28．3％，50度样总酸仅上升11％，固形物平均上升39．2％，28度样上升43％，50度样上升18％，总酯平均下降24％，28度样下降34％，50度样下降31％，己酸己酯平均下降32．4％，28度样下降59％，50度样下降32％，贮存6年的5个样总酸平均上升39．8％，28度样上升52％，50度样上升41％，固形物平均上升71．8％，28度样上升635＜50度样上升77％，总酯平均下降42．4％，28度样下降54％，50度样下降31％，己酸乙酯平均下降51．8％，28度样下降69％，50度样下32%.

Changes of Chemiphysical Indexes of Bottled Luzhou-flavor Liquors During Storage

The chemiphysical indexes of Zhongzi brand series Luzhou-flavor liquors from1996to1999were determined and the results indicated that great changes had taken place by increase of the contents of total acids and solids and by decrease of the contents of total esters and ethyl caproate.Close correlations existed between change range and storage period and longer storage period resulted in greater changes.After three years storage,the average contents of total acids and solids of the five liquor samples covering from high alcohol content to low alcohol content increased by18.2%(the contents of total acids increased by28.3%for liquor with28%alco-hol content and only by11%for liquor with50%alcohol content )and39.2%(solids contnets increased by43%for liquor with28%alcohol content and by18%for liquor with50%alcohol content )respectively,the average contents of total esters and ethyl caproate dropped by24%(total esters dropped by34%for liquor with28%alcohol content and by31%for liquor with50%alco-hol content )and by32.4%(ethly caproate dropped by59%for liquor with28%alcohol content and by32%for liquor with50%alcohol content )respectively.After six years storage,the average contents of total acids and solids of the five liquor samples covering from high alcohol content to low alcohol content increased by39.8%(total acids by52%for liquor with28%alcohol content and only41%for liquor with50%alcohol content )and71.8%(solids by63%for liquor with28%alcohol content and77%for liquor with50%alcohol content )respectively,the average contents of total esters and ethyl caproate dropped by42.4%(total esters by54%for liquor with28%alcohol content and31%for liquor with50%alcohol content )and51.8%(ethyl caproate by69%for liquor with28%alcohol content and32%for liquor with50%alcohol content )respectively.(Tran.by YUE Yang)