A Comparative Study on Response Surface Optimization of Supercritical Fluid Extraction Parameters to Obtain Portulaca Oleracea Seed Oil with Higher Bioactive Content and Antioxidant Activity Than Solvent Extraction. Issue 2 (30th December 2022)

• Record Type: Journal Article
• Authors: Hossein Zadeh, Janan; Özdikicierler, Onur; Pazır, Fikret
• Is Part Of: European journal of lipid science and technology. Volume 125:Issue 2(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-12-30
• Subjects: antioxidant activity -- oil quality -- omega‐3 and omega‐6 -- purslane seed oil -- response surface methodology -- supercritical fluid extraction; Oils and fats, Edible -- Periodicals; Lipids -- Periodicals; 660.63
• DOI: 10.1002/ejlt.202200136
• Languages: English
• ISSNs: 1438-7697

Abstract

Abstract: Portulaca oleracea (purslane) seed oil is a rich source of omega‐6 and omega‐3 fatty acids. Extraction of the purslane seed oil while preserving its high nutritive quality has been a challenge since conventional solvent extraction has many adverse effects on bioactive content. This study aims the optimization of purslane seed oil supercritical fluid extraction (SFE) conditions and to compare purslane seed oils obtained with SFE and conventional solvent extraction in terms of oil yield, along with the purslane seed oil quality and bioactive content. For this purpose, the SFE process parameters (pressure, temperature, static time, and dynamic time) are optimized for oil yield, omega‐6, omega‐3, and antioxidant activity using response surface methodology (RSM). Optimum SFE pressure, temperature, static time, and dynamic time levels are determined as 350 bar, 50 °C, 20 min, and 90 min, respectively. Oil yield and physicochemical quality properties of conventional solvent extract and SFE samples are determined and compared. Consequently, samples obtained via SFE and solvent extraction have similar quality properties. Distinctly, SFE allows an extraction with 5.6% higher total phenolic compound (TPC) and 33% higher antioxidant activity than solvent extraction. Practical Applications : In the study, the extraction of purslane oil using supercritical fluid extraction is optimized with different approaches. At optimum conditions, purslane oil is extracted and all physicochemical properties and the process efficiency (yield) are compared with the solvent‐extracted samples. The results of this study make supercritical fluid extraction of purslane seed oil possible since all optimum operating conditions of a pilot‐sized extractor are reported in the study. It is believed that the results provide a good starting point for industrial operations. Moreover, researchers also believe that research studies unveiling the new potential oil‐bearing seeds are important to overcome the vegetable oil shortage that emerged this year. Abstract : P. Oleracea seeds milled and extracted via SFE and solvent extraction SFE extraction parameters are optimized according to RSM PUFA content of P. Oleracea seed oil is approximately 61% Omega‐3 content is high when dynamic and static times are high SFE samples are 5.6% higher in TPC and 33% higher in antioxidant activity than solvent extraction samples