Essential Oil Extracted from Cymbopogon citronella Leaves by Supercritical Carbon Dioxide: Antioxidant and Antimicrobial Activities

Hong Wu; Jilie Li; Yuan Jia; Zhihong Xiao; Peiwang Li; Yixian Xie; Aihua Zhang; Rukuan Liu; Zewen Ren; Mengrui Zhao; Chaozhen Zeng; Changzhu Li

doi:10.1155/2019/8192439

Journal of Analytical Methods in Chemistry (Jan 2019)

Essential Oil Extracted from Cymbopogon citronella Leaves by Supercritical Carbon Dioxide: Antioxidant and Antimicrobial Activities

Hong Wu,
Jilie Li,
Yuan Jia,
Zhihong Xiao,
Peiwang Li,
Yixian Xie,
Aihua Zhang,
Rukuan Liu,
Zewen Ren,
Mengrui Zhao,
Chaozhen Zeng,
Changzhu Li

Affiliations

Hong Wu: Key Laboratory of Cultivation and Protection Co-constructed for Non-wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China
Jilie Li: Key Laboratory of Cultivation and Protection Co-constructed for Non-wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China
Yuan Jia: Key Laboratory of Cultivation and Protection Co-constructed for Non-wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China
Zhihong Xiao: Key Laboratory of State Forestry Administration on Utilization Science for Southern Woody Oil Resource, Hunan Academy of Forestry, Changsha 410004, China
Peiwang Li: Key Laboratory of State Forestry Administration on Utilization Science for Southern Woody Oil Resource, Hunan Academy of Forestry, Changsha 410004, China
Yixian Xie: Key Laboratory of Cultivation and Protection Co-constructed for Non-wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China
Aihua Zhang: Key Laboratory of Cultivation and Protection Co-constructed for Non-wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China
Rukuan Liu: Key Laboratory of State Forestry Administration on Utilization Science for Southern Woody Oil Resource, Hunan Academy of Forestry, Changsha 410004, China
Zewen Ren: Key Laboratory of Cultivation and Protection Co-constructed for Non-wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China
Mengrui Zhao: Key Laboratory of Cultivation and Protection Co-constructed for Non-wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China
Chaozhen Zeng: Key Laboratory of Cultivation and Protection Co-constructed for Non-wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China
Changzhu Li: Key Laboratory of State Forestry Administration on Utilization Science for Southern Woody Oil Resource, Hunan Academy of Forestry, Changsha 410004, China

DOI: https://doi.org/10.1155/2019/8192439
Journal volume & issue: Vol. 2019

Abstract

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To improve essential oil quality, especially to reserve the thermal instability of compounds, supercritical CO2 extraction (SFE) was applied to recover essential oil from Cymbopogon citronella leaves. A response surface methodology was applied to optimize the extraction process. The highest essential oil yield was predicted at extraction time 120 min, extraction pressure 25 MPa, extraction temperature 35°C, and CO2 flow 18 L/h for the SFE processing. Under these experimental conditions, the mean essential oil yield is 4.40%. In addition, the chemical compositions of SFE were compared with those obtained by hydrodistillation extraction (HD). There were 41 compounds obtained of SFE, while 35 compounds of HD. Alcohols and aldehydes were the main compositions in the essential oils. Furthermore, the antioxidant activities and antimicrobial of essential oils obtained by HD and the evaluated condition of SFE were compared. Results showed that the antioxidant activities of SFE oil are better than those of HD. Minimum inhibitory concentrations (MICs) were determined by the microdilution method. Essential oil obtained from SFE and HD exhibited a significant antimicrobial activity against all tested microorganisms. It is confirmed that the SFE method can be an alternative processing method to extract essential oils from Cymbopogon citronella leaves.

Published in Journal of Analytical Methods in Chemistry

ISSN: 2090-8865 (Print); 2090-8873 (Online)
Publisher: Wiley
Country of publisher: United Kingdom
LCC subjects: Science: Chemistry: Analytical chemistry
Website: https://onlinelibrary.wiley.com/journal/1471

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