Abstract
Aqueous enzyme-assisted solvent extraction (AE-SE) of oil from apricot (Prunus armeniaca L.) kernel was investigated in this study and the operational parameters were optimized. After preliminary screening, a cocktail of enzymes (Celluclast 1.5 L and Alcalase Pure 2.4 L [60:40, v/v)] of 1% (v/w) was chosen. The extraction process parameters: temperature (40-60 °C), time (1-5 h), and pH (4-9) were optimized using Box-Behnken design to achieve the highest oil yield (%) and antioxidant activity (DPPH, %). Under optimized conditions, i.e., temperature 40 °C, time 2.5 h, and pH 8.28, the highest oil yield and DPPH were 47.93% and 67.31%, respectively. The gas chromatography analysis disclosed that apricot kernel oil extracted by solvent extraction and AE-SE have similar fatty acid compositions, and the oil is rich in unsaturated fatty acids. The physicochemical analysis showed AE-SE method produces high-quality oil and can be substituted as green technology for industrial oil extraction purposes.
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