Potentiometric determination of the total acidity and concentration of citric acid in wines

被引：9
|
作者：
Zakharova, E. A. [1 ]
Moskaleva, M. L. [1 ]
Akeneev, Yu. A. [1 ]
Moiseeva, E. S. [1 ]
Slepchenko, G. B. [1 ]
Pikula, N. P. [1 ]
机构：
[1] Tomsk Polytech Univ, Fac Chem & Chem Technol, Tomsk 634050, Russia
来源：
JOURNAL OF ANALYTICAL CHEMISTRY | 2011年 / 66卷 / 09期
关键词：
potentiometry; citric acid; wines; ORGANIC-ACIDS; ELECTRODE; CITRATE;
D O I：
10.1134/S1061934811090218
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The method of potentiometric titration with a copper electrode is used for the determination of the total acidity and concentration of citric acid (CA) in identifying the adulteration of wines. The procedure is suitable for the determination of citric acid in wines in the range from 0.1 to 3.5 g/L in the presence of 30-fold amounts of tartaric, acetic, malic, succinic acids and a 10-fold amount of oxalic acid after the separation of organic carboxylic acids on an AV-17-8 anion exchanger. The procedure was developed and certified for the potentiometric determination of the mass fraction of citric acid in table wines and wine materials with an error not exceeding 20%. The criteria (mass fraction of citric acid, the percentage of citric acid in the total acidity, and the shape of the curves of potentiometric titration) were proposed for revealing the adulteration of the acid composition of wines.
引用
收藏
页码：848 / 853
页数：6
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