A comparison of avocado oil extraction between solvent extraction and oil screw press

Abstract

The purpose of this research was to compare the amount of avocado oil obtained between solvent extraction (hexane and ethanol) and an oil screw press. Then we analyzed the physical and chemical quality. The solvent extraction with hexane and ethanol used Hass avocado powder with a solvent ratio of 1 : 2 by weight. It was found that the avocado oil content obtained from hexane solvent extraction was significantly higher than the other methods (p≤0.05) at 62.15 percent dry weight. Physical quality was founded on the fact that the avocado oil color extracted with hexane had a darker olive green color than other methods; the color value L* a * b *, viscosity, and density values were significantly higher than those of the other methods (p≤0.05): 24.18+2.00, 7.42+1.50, 0.89+1.99, 59.13+1.00, 11.79+1.65, 0.81+1.88 percentage, and 83.75+1.96 mg/kg fat, respectively. The chemical quality of palmitic acid, palmitoleic acid, stearic acid, oleic acid, octadecenedioic acid, linolenic acid, and antioxidants in avocado oil extracted with hexane were significantly higher than the other methods (p≤0.05). were founded at 24.18+2.00, 7.42+1.50, 0.89+1.99, 59.13+1.00, 11.79+1.65, 0.81+1.88 percentage, and 83.75+1.96 mg/kg fat, respectively. Peroxide value and acid value in avocado oil extracted by oil screw press were significantly higher than the other methods (p≤0.05): 10.28+1.52 meq kg-1 oil and 1.77+2.11 mg KOH/g oil, respectively.