Study on antioxidant and antimicrobial activities of essential oils extracted from peels of pomelos grown at different locations in Vietnam

Abstract

Chemical composition, antioxidant and antimicrobial activities of essential oils (EOs) extracted by cold pressing method from peel of many pomeloes (Da Xanh, 5 Roi, Duong Cam, Long pomelo) at different provinces in Vietnam (Dong Nai, Vinh Long, Ben Tre and Dong Thap) were investigated in this study. Analysis GC, the chemical compositions of EOs were determined. There were seventeen components. Among that, each pomelo peels EOs had different components. However, four components were main components in pomelo peel (2V LQFOXGLQJ_ OLPRQHQH_ Ä-WHUSLQHQH_ Ă-phellandrene and myrcene. In all EOs, limonene concentration in pomelo peels was highest (67.2%-95.7%) and BL had highest limonene concentration with 95.7%. To determine antioxidant and antimicrobial activities, DPPH assay, diffusion and dilution method were applied. Long pomelo EOs was the highest in extration yield, antioxidant and antimicrobial activities. Da Xanh (Ben Tre) pomelo EOs gave the lowest antioxidant activity. The antimicrobial activity of EOs against S.iniae was lower than P.aeruginosa. 5 Roi and Duong Cam pomelo EOs had nearly the same affect on microorganism. This study was shown that differences in chemical compositions of many pomelos peel EOs lead to their antioxidant and antimicrobial activities were also different. Keywords: pomelo Essential oil Gas chromatography Chemical composition Antioxidant activity Antibacterial activity