pH-metric determination of acid values in vegetable oils without titration

被引：49
|
作者：
Turyan, YI [1 ]
Berezin, OY [1 ]
Kuselman, I [1 ]
Shenhar, A [1 ]
机构：
[1] HEBREW UNIV JERUSALEM,NATL PHYS LAB,IL-91904 JERUSALEM,ISRAEL
来源：
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY | 1996年 / 73卷 / 03期
关键词：
acid value; conditional pH; isopropanol; pH-metry; titration; triethanolamine; vegetable oils;
D O I：
10.1007/BF02523422
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A new method for determining acid values in vegetable oils has been developed for a nontitration pH-metric technique with a reagent consisting of 0.20 M triethanolamine in a 1:1 solution of water and isopropanol. The emulsive properties of this reagent provide rapid (within a minute) and quantitative extraction of free fatty acids from an oil into the solvent phase. Acid values were determined by measuring conditional pH of the emulsified reagent in a pH-meter with an aqueous reference electrode. Three different applications of this technique are discussed.
引用
收藏
页码：295 / 301
页数：7
相关论文
共 23 条
  • [21] Correlation between refractive index of vegetable oils measured with surface plasmon resonance and acid values determined with the AOCS official method
    Cho, Yong-Jin
    Kim, Tae-Eun
    Gil, Bogim
    LWT-FOOD SCIENCE AND TECHNOLOGY, 2013, 53 (02) : 517 - 521
  • [22] Determination of the acid values of edible oils via FTIR spectroscopy based on the O-H stretching band
    Jiang, Xiuming
    Li, Shen
    Xiang, Guoqiang
    Li, Qiuhong
    Fan, Lu
    He, Lijun
    Gu, Keren
    FOOD CHEMISTRY, 2016, 212 : 585 - 589
  • [23] Rapid Determination of 17 Phthalate Acid Esters Residues in Vegetable Oils by Gas Chromatography-Electrostatic Field Orbitrap High Resolution Mass Spectrometry
    Meng Z.
    Huang Y.
    Li Y.
    Sun W.
    Wang D.
    Li Q.
    Fan S.
    Zhang Y.
    Shipin Kexue/Food Science, 2021, 42 (06): : 298 - 304
123