Studies on the Essential Oils and Biological Activity of Citrus Spp

• Main Author: FELICITY VALARIE, JAWAN
• Format: Final Year Project Report
• Language: English; English
• Published: Universiti Malaysia Sarawak, (UNIMAS) 2019
• Subjects: QD Chemistry
• Online Access: http://ir.unimas.my/id/eprint/37889/1/FELICITY%20VALARIE%20ANAK%20JAWAN%2024pgs.pdf; http://ir.unimas.my/id/eprint/37889/4/Felicity%20Valarie%20Jawan%20ft.pdf; http://ir.unimas.my/id/eprint/37889/

Leaves and peels of four different Citrus spp (Cilrus hystrix, Citrus microcarpa, Citrus lemon, Citrus reticulata) were subjected to hydrodistillation using Clevenger-type apparatus. The average yields of essential oils in the leaves and peels ranged from 0.08 % to 0.73 % and 0.30 % to 1.01 % respectively. The oils obtained from the fresh leaves and peels sample were analyzed by Gas-chromatography-mass spectrometry (GC-MS). Total of 23 and 20 chemical constituent were identified respectively. The major compounds found in the leaves oils were d-limonene, citronellal, linalool, caryophyllene and humulene. Major compounds found in the peels oils of Citrus spp were d-limonene, beta-bisabolene, alpha-bisabolol and alpha-cadino!. The cytotoxic effect of Citrus spp with brine shrimp given LC;o more than 100 >Jg/mL show that Cilrus spp oils practically non-toxic. All the Citrus spp oils have good antioxidant activity except leaves of Cilrus microcarpa and. Citrus reticulata which have moderate antioxidant activity.