title: Optimization of microwave-assisted extraction of cottonseed oil and evaluation of its oxidative stability and physicochemical properties.
abstract: Microwave assisted extraction (MAE) is a novel method, which can reduce the extraction time and solvent consumption. This study aimed to evaluate the influence of MAE on oxidative stability and physicochemical properties of cottonseed oil. We found that the optimum extraction conditions were: irradiation time 3.57 min; cottonseed moisture content 14% and cottonseed to solvent ratio 1:4, which resulted in an extraction efficiency of 32.6%, 46 ppm total phenolic content, 0.7% free fatty acids, peroxide value of 0.2 and 11.5 h of Rancimat oxidative stability at 110 °C. GC analysis for MAE cottonseed oil determined palmitic acid (23.6%), stearic acid (2.3%), oleic acid (15.6%) and linoleic acid (55.1%), which were not significant different (P>0.05) than conventionally-extracted (control) cottonseed oil. MAE oil samples from whole cottonseed (without dehulling) had the greatest long-term stability, more than oil samples containing BHT.
authors.affiliation: Department of Food Materials and Process Design Engineering, Faculty of Food Science and Technology, University of Agricultural Sciences and Natural Resources, Gorgan, Iran. Electronic address: m.taghvaii@gmail.com.
authors.forename: Mostafa
authors.initials: M
authors.lastname: Taghvaei
authors.affiliation: Department of Food Materials and Process Design Engineering, Faculty of Food Science and Technology, University of Agricultural Sciences and Natural Resources, Gorgan, Iran. Electronic address: smjafari@gau.ac.ir.
authors.forename: Seid Mahdi
authors.initials: SM
authors.lastname: Jafari
authors.affiliation: Department of Food Materials and Process Design Engineering, Faculty of Food Science and Technology, University of Agricultural Sciences and Natural Resources, Gorgan, Iran.
authors.forename: Elham
authors.initials: E
authors.lastname: Assadpoor
authors.affiliation: Cotton Research Institute, Gorgan, Iran.
authors.forename: Shahram
authors.initials: S
authors.lastname: Nowrouzieh
authors.affiliation: Cotton Research Institute, Gorgan, Iran.
authors.forename: Omran
authors.initials: O
authors.lastname: Alishah
mesh_terms: D055598:Chemical Phenomena; D003369:Cottonseed Oil / Q000737:chemistry / Q000302:isolation & purification*; D005227:Fatty Acids / Q000032:analysis; D008872:Microwaves; D010084:Oxidation-Reduction; D010636:Phenols / Q000032:analysis
chemical_list: D003369:Cottonseed Oil; D005227:Fatty Acids; D010636:Phenols
keywords: Cottonseed oil; Microwave-assisted extraction; Response surface methodology; Thermal stability