PH-METRIC DETERMINATION OF ACID VALUES IN VEGETABLE-OILS WITHOUT TITRATION

Authors
TURYAN YI BEREZIN OY KUSELMAN I SHENHAR A
Citation
Yi. Turyan et al., PH-METRIC DETERMINATION OF ACID VALUES IN VEGETABLE-OILS WITHOUT TITRATION, Journal of the American Oil Chemists' Society, 73(3), 1996, pp. 295-301
Citations number
19
Categorie Soggetti
Food Science & Tenology","Chemistry Applied
Journal title
Journal of the American Oil Chemists' Society → ACNP
ISSN journal
0003021X
Volume
73
Issue
3
Year of publication
1996
Pages
295 - 301
Database
ISI
SICI code
0003-021X(1996)73:3<295:PDOAVI>2.0.ZU;2-W
Abstract
A new method for determining acid values in vegetable oils has been de veloped for a nontitration pH-metric technique with a reagent consisti ng of 0.20 M triethanolamine in a 1:1 solution of water and isopropano l. The emulsive properties of this reagent provide rapid (within a min ute) and quantitative extraction of free fatty acids from an oil into the solvent phase. Acid values were determined by measuring conditiona l pH of the emulsified reagent in a pH-meter with an aqueous reference electrode. Three different applications of this technique are discuss ed.