EXTRACTION AND IDENTIFICATION OF ESSENTIAL OIL FROM CINNAMOMUM ZEYLANICUM BARKS AND STUDY THE ANTIBACTERIAL ACTIVITY

This study aimed to identify the essential oil compound from Cinnamomum zeylanicum barks by using GC-MS analysis and evaluate essential oil inhibition effects against Listeria monocytogenes, Escherichia coli, Enterobacter aerogenes, Pseudomonas erogenous and Staphylococcus aureus by using agar diffusion method and studied kill-time for this bacterium. The yield of Cinnamomum zeylanicum essential oil was 5%. Cinnamaldehyde 57.83% was the main compound in the essential oil extract, followed by cyclohexane carboxylic acid 9.29% and 6-octadecenoic acid 8.41%. Gram-positive and Gram-negative bacteria were inhibited growth after addition 6, 12 and 18 μL of essential oil. Zone diameter of inhibition ranged from 17.00-30.30 mm for bacterial test. A concentration of 10, 20 and 30 μL.mL-1 of the essential oil caused a rapid and steady decline in the number of viable cells from 2 to 5 Log. cycles of all strains during 24 hours.