摘要
以鲜榨菠萝汁为样品,建立了测定果汁总酸的自动电位滴定法。测定结果表明,鲜榨菠萝汁样品中的总酸含量为3.60g/L,变异系数为0.053%,回收率为99.7%～99.9%,该方法适用于果汁中总酸量的快速测定。对样品保存过程中酸度变化的研究表明,时间、温度、水分是影响酸度变化的主要因素。
With fresh pineapple juice as a sample, the automatic potentionmetric titration was established to analyze the total acidity in the fruit juices. The result shows that the total acidity content was 3.6 g/L, and the variation coefficient was 0.053%. The recovery rate was 99.7%-99.9%. This method was suitable to analyze the total acidity in the fruit juices expeditiously. Meanwhile a series of results can be observed from the changing acidity during the storing procedure.Time, moisture and temperature were crucial factors to decide the final acidity of the sample.
出处
《化学分析计量》
CAS
2007年第5期53-56,共4页
Chemical Analysis And Meterage
关键词
自动电位滴定法
菠萝汁
总酸
酸度变化
automatic potentionmetric titration, pineapple juice, total acidity, acidity change
