VOLTAMMETRIC DETERMINATION OF ACID VALUES OF FATS AND OILS

被引：1

作者：

KUSU, F ^{[1
]}

FUSE, T ^{[1
]}

TAKAMURA, K ^{[1
]}

机构：

[1] TOKYO UNIV PHARM & LIFE SCI,HACHIOJI,TOKYO 19203,JAPAN

来源：

JOURNAL OF AOAC INTERNATIONAL | 1994年 / 77卷 / 06期

关键词：

D O I：

暂无

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new method for determining acid values of fats and oils was developed based on measurement of reduction prepeak current of 2-methyl-1,4-naphthoquinone (VK3) from 8 x10(-6) to 6 x 10(-3) M, due to free fatty acid (e.g., linoleic acid). Acid value of 11 samples was determined. The relative standard deviation of acid value for 5 replicates of each sample was less than 2.5%. The method is superior to conventional titration methods in sensitivity and overcomes inaccuracy due to vagueness in color change of acid-base indicators in organic solvents.

引用

页码：1686 / 1689

页数：4

共 7 条

[1] [Anonymous], 1990, OFFICIAL TENTATIVE M
[2] Firestone D., 1989, OFFICIAL TENTATIVE M
[3] Kawai N., 1985, Yukagaku, V34, P921
[4] EFFECTS OF PROTON DONORS ON POLAROGRAPHIC REDUCTION OF METHYL PARA BENZOQUINONE IN AQUEOUS AND METHYL CELLOSOLVE SOLUTIONS
TAKAMURA, K
HAYAKAWA, Y
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1971, 31 (01): : 225 - &
[5] POLAROGRAPHIC DETERMINATION OF ACIDS BY MEANS OF REDUCTION WAVE OF QUINONES IN METHYL CELLOSOLVE SOLUTION
TAKAMURA, K
HAYAKAWA, Y
[J]. ANALYTICA CHIMICA ACTA, 1968, 43 (02) : 273 - &
[6] 1991, JAPAN PHARMACOPEIA, pB448
[7] 1990, US PHARMACOPEIA, V22, P1535

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