Croatica Chemica Acta, Vol. 76 No. 4, 2003.
Original scientific paper
Acids Extraction from Vegetable Oils for Acid Value pH-metric Determination without Titration
Elena Kardash-Strochkova
; National Physical Laboratory of Israel (INPL), Givat Ram, Jerusalem 91904, Israel
Yakov I. Tur’yan
; National Physical Laboratory of Israel (INPL), Givat Ram, Jerusalem 91904, Israel
Avi Shenhar
; National Physical Laboratory of Israel (INPL), Givat Ram, Jerusalem 91904, Israel
Ilya Kuselman
; National Physical Laboratory of Israel (INPL), Givat Ram, Jerusalem 91904, Israel
Abstract
Theoretical and experimental analysis of free fatty acids extraction from vegetable oils into a reagent containing triethanolamine for pH-metric acid value determination without titration was carried out. Practically complete extraction of the free fatty acids in the form of triethanolammonium salts was demonstrated. The obtained results allow to understand more possibilities of the pH-metric and other methods for acid value determination in different oils.
Keywords
acid value; vegetable oils; palmitic and oleic acids; dissociation constants; extraction
Hrčak ID:
103195
URI
Publication date:
28.11.2003.
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