Effect of Solvent Ratio and Extraction Temperature on the Purity of Vitamin E from Palm Fatty Acid Distillate Extract
Abstract
The presence of vitamin E in palm fatty acid distillate (PFAD) mixes with free fatty acids (FFA) so separation process is required. Vitamin E can be separated through a process technology that removes fat components and non-saponifiable components. The combination of separation process technology used are homogenization, neutralization and extraction. Extraction was carried out using multiple solvents including n-hexane, ethanol, and water to bind each component based on its polarity index. This study aims to determine the significant effect of solvent composition and extraction temperature on the yield and purity of vitamin E. The purity of vitamin E is strongly influenced by the variables, the lower the ethanol ratio and the higher the extraction temperature, the higher the yield and purity of vitamin E obtained. The highest yield of vitamin E to PFAD was 13.07%-w/w in the solvent composition n-hexane:ethanol:water 45:10:45 at 65◦C. A high purity vitamin E concentrate was obtained with the lowest acid number of 15.50 mg KOH/g sample and very strong antioxidant activity (IC50 value 17.07 ppm) on the composition of n-hexane:ethanol:water 40:20:40 at 60◦C.
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