内标—标准曲线法测定葡萄酒和果酒中的乙醇含量

Determination of the Alcohol Contensts in Grape Wine and Fruit Wine by Internal Standard-Standard Curve Methord

用内标-标准曲线法测定葡萄酒和果酒中的乙醇含量，在2．0％～25．0％（v／v％）线性范围内呈良好的线性关系（相关系数为0．9993），相对标准偏差（RSD，n：6）为0．19％。同时用酒精计法加以验证，最大偏差为0．3％，满足国家判定标准偏差正负l％的要求。此方法具有方便快捷、高效、结果准确等优点，适合于批量样品的检测。

To determine the alcohol contents in grape wine and fruit wine by internal standard - standard curve methord, it showed that alcohol content was in a good linear relation （ r = 0. 9993 ） with the range from 2. 0 % 25.0 % （v/v%）, RSD （n =6） was 0. 19 %. The maximum deviation was 0. 3 % ,validating with alcohol meter method and satisfying the national standard deviation requirementof plus or minus 1%. The internal standard - standard curve methord was convenient, quick, efficient and accurate, and could be used for mass detection of the alcohol concentration.