| 自动电位滴定法测定果汁的总酸及果汁酸度的变化规律 |
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| 引用本文： | 罗盛旭,吴良,梁振益,牛成,杨雪蕊. 自动电位滴定法测定果汁的总酸及果汁酸度的变化规律[J]. 化学分析计量, 2007, 16(5): 53-56 |
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| 作者姓名： | 罗盛旭 吴良 梁振益 牛成 杨雪蕊 |
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| 作者单位： | 海南大学理工学院,海南省精细化工重点实验室,海口,570228;海南大学公共实验中心,海口,570228 |
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| 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。
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| 关 键 词： | 自动电位滴定法 菠萝汁 总酸 酸度变化 |
| 收稿时间： | 2007-06-28 |
| 修稿时间： | 2007-06-28 |
ANALYSIS OF TOTAL ACIDITY IN FRUIT JUICES BY AUTOMATIC POTENTIONMETRIC TITRATION AND THE CHANGE RULES OF THE ACIDITY |
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| Luo Shengxu,Wu Liang,Liang Zhenyi,Niu Cheng,Yang Xuerui. ANALYSIS OF TOTAL ACIDITY IN FRUIT JUICES BY AUTOMATIC POTENTIONMETRIC TITRATION AND THE CHANGE RULES OF THE ACIDITY[J]. Chemical Analysis And Meterage, 2007, 16(5): 53-56 |
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| Authors: | Luo Shengxu Wu Liang Liang Zhenyi Niu Cheng Yang Xuerui |
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| Affiliation: | 1.Province Key Laboratory of Refined Chemistry,Science and Engineering College,Hainan University,Haikou 570228,China;2.Public Experiment Center of Hainan University,Haikou 570228,China |
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| Abstract: | 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. |
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| Keywords: | automatic potentionmetric titration pineapple juice total acidity acidity change |
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