The Malaysian Journal of Analytical Sciences Vol 12 No 1 (2008): 205 -209

 

 

KAJIAN PENGOPTIMUMAN TINDAK BALAS HIDROLISIS MINYAK KACANG SOYA

 

Hasnisa binti Hashim dan Jumat Salimon

 

Program Oleokimia, Pusat Pengajian Sains Kimia dan Teknologi Makanan,

Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia

 

Abstract

The hydrolysis reaction of soybean oil was optimized. The concentration effect of ethanolic alkaline  solution  (KOH and NaOH) to the oil acidity was studied. The alkaline concentrations, reaction time and temperature factors was investigated during the optimization of the hydrolysis or saponification reaction. KOH solution of 1 M  showed a good saponification activity which resulted oil acid value of 226.8 mg/g compared to NaOH solution with acid value of 225.4 mg/g for the same reaction. The optimum saponification reaction of soybean oil occured at 60 °C in 30 minutes by using ethanolic KOH 1 M with acid value of 229.6 mg/g. Composition of free fatty acid before and after hydrolysis were dertermined by using gas chromatography.

 

Keywords: Hydrolysis, soybean oil, ethanolic alkaline solution

 

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