Development and validation of an ultrasound-assisted supercritical carbon-dioxide procedure for the production of essential oils from Perilla frutescens. (June 2020)

• Record Type: Journal Article
• Authors: Yang, Yu-Chiao; Wang, Chia-Sui; Wei, Ming-Chi
• Is Part Of: Lebensmittel-Wissenschaft + Technologie =. Volume 128(2020)
• Publication Date: 2020-06
• Subjects: Perilla frutescens -- Steam distillation -- Ultrasound-assisted supercritical CO2 extraction -- Volatile oils -- Theoretical solubility; Food industry and trade -- Periodicals; Food -- Composition -- Periodicals; Microbiology -- Periodicals; Nutrition -- Periodicals; 664.005
• DOI: 10.1016/j.lwt.2020.109503
• Languages: English
• ISSNs: 0023-6438

Abstract

Abstract: Four different isolation techniques, the ultrasound-assisted supercritical CO2 (UscCO2 ) extraction, traditional supercritical CO2 (TscCO2 ) extraction, steam distillation (STD) and heat-reflux extraction (HRE), were utilized to isolate volatile oils from the purple leaves of P. frutescens . The highest yield of volatile oils obtained by the UscCO2 procedure was 1.62% (weight of extracted oil/dry weight of plant material), which was 13.7, 30.2 and 72.2% higher than the oil yields obtained by TscCO2 extraction, STD and HRE, respectively. In addition, the content of perillaldehyde (49.76%, w/w) obtained by the UscCO2 process was approximately 1.09, 1.43 and 1.23 times higher than the contents obtained by STD, HRE and TscCO2 extraction, respectively. Moreover, the theoretical solubility of volatile oils in supercritical solvent was evaluated with the dynamic extraction method and then correlated with the Chrastil, Bartle and Kumar and Johnston models, with average absolute relative deviations ( AARDs ) of 0.71%, 0.74% and 3.56%, respectively. Highlights: Four isolation techniques were used to obtain essential oils from Perilla frutescens. Ultrasound-assisted supercritical CO2 method has the highest extraction efficiency. This enhancement is due to the combined effects of cavitation, heat and mechanics. The dominant component in the perilla essential oil is perillaldehyde. The theoretical solubility of perilla oil well fit three density-based models.