pH‐metric determination of acid values in vegetable oils without titration
- 1 March 1996
- journal article
- Published by Wiley in Journal of Oil & Fat Industries
- Vol. 73 (3) , 295-301
- https://doi.org/10.1007/bf02523422
Abstract
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.Keywords
This publication has 5 references indexed in Scilit:
- Determination of Free Fatty Acids in Dairy Products by Direct Coupling of a Continuous Preconcentration Ion-Exchange-Derivatization Module to a Gas ChromatographAnalytical Chemistry, 1994
- Automatic method for on-line preparation of fatty acid methyl esters from olive oil and other types of oil prior to their gas chromatographic determinationAnalytica Chimica Acta, 1993
- Rapid quantitative determination of free fatty acids in fats and oils by fourier transform infrared spectroscopyJournal of Oil & Fat Industries, 1993
- Aqueous isopropyl alcohol for extraction of free fatty acids from oilsJournal of Oil & Fat Industries, 1989
- Dynamic response of the glass electrodeJournal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1968