title: Optimization of ultrasonic-assisted extraction of pomegranate (Punica granatum L.) seed oil.
abstract: The effectiveness of ultrasonic-assisted extraction (UAE) of pomegranate seed oil (PSO) was evaluated using a variety of solvents. Petroleum ether was the most effective for oil extraction, followed by n-hexane, ethyl acetate, diethyl ether, acetone, and isopropanol. Several variables, such as ultrasonic power, extraction temperature, extraction time, and the ratio of solvent volume and seed weight (S/S ratio) were studied for optimization using response surface methodology (RSM). The highest oil yield, 25.11% (w/w), was obtained using petroleum ether under optimal conditions for ultrasonic power, extraction temperature, extraction time, and S/S ratio at 140 W, 40 °C, 36 min, and 10 ml/g, respectively. The PSO yield extracted by UAE was significantly higher than by using Soxhlet extraction (SE; 20.50%) and supercriti cal fluid extraction (SFE; 15.72%). The fatty acid compositions were significantly different among the PSO extracted by Soxhlet extraction, SFE, and UAE, with punicic acid (>65%) being the most dominant using UAE.
authors.affiliation: College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, PR China.
authors.forename: Yuting
authors.initials: Y
authors.lastname: Tian
authors.forename: Zhenbo
authors.initials: Z
authors.lastname: Xu
authors.forename: Baodong
authors.initials: B
authors.lastname: Zheng
authors.forename: Y
authors.initials: Y
authors.lastname: Martin Lo
mesh_terms: D005591:Chemical Fractionation / Q000379:methods*; D005227:Fatty Acids / Q000032:analysis; D029561:Lythraceae / Q000737:chemistry*; D010938:Plant Oils / Q000737:chemistry / Q000302:isolation & purification*; D012639:Seeds / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013696:Temperature; D013997:Time Factors; D014465:Ultrasonics
chemical_list: D005227:Fatty Acids; D010938:Plant Oils; D012997:Solvents