Chemical and Materials Engineering Vol. 1(3), pp. 96 - 103
DOI: 10.13189/cme.2013.010306
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Determination of Free Fatty Acids in Palm Oil Samples by Non-Aqueous Flow Injection Using Salicyaldehyde-2,4-Dinitrophenylhydrazone as Colorimetric Reagent


Abdussalam Salhin Mohamed Ali1,*, Abdurrhman Moussa Abdurrhman 2
1 School of Chemmical Sciences, Universiti Sains Malaysia
2 Chemistry Department, Faculty of Science, Sirt University, Sirt, PO. 674, Libya

ABSTRACT

The free fatty acids (FFA) in palm oil were determined by flow injection titrimetric method using salicyladhyde-2,4-dinitrophenylphenylhydrazone (SDPH) as a new coloring reagent. The compound was synthesized and its structure was established using different spectroscopic data. It exhibited sensitive colour changes in basic medium and absorb at 482 nm. Single-line manifold using SDPH as indicator was developed. Flow injection operating parameters such as carrier, reagent concentration, flow rate, size of mixing chamber and injection volume were optimized. The method is recommended for the determination of oil samples with acidity degree (a.d.) higher than 0.5 a.d. Twelve oil samples were tested using the appropriate FIA manifold and the obtained results were compared to the standard PORIM method. Good correlation (r2 = 0.99) between the two methods was obtained.

KEYWORDS
Palm Oil, FIA Analysis, Free Fatty Acid, Hydrazone

Cite this paper
Abdussalam Salhin Mohamed Ali , Abdurrhman Moussa Abdurrhman (2013). Determination of Free Fatty Acids in Palm Oil Samples by Non-Aqueous Flow Injection Using Salicyaldehyde-2,4-Dinitrophenylhydrazone as Colorimetric Reagent. Chemical and Materials Engineering, 1 , 96 - 103. doi: 10.13189/cme.2013.010306.