Komposisi Kimia dan Aktivitas Antibakteri Minyak Atsiri Kulit Kayu Manis (Cinnamomum burmannii) asal Sumatera Barat

This study investigated the chemical composition and antibacterial activity of essential oil extracted from cinnamon bark (Cinnamomum burmannii) collected from Tanah Datar, West Sumatra, Indonesia. Essential oil was obtained by steam-water distillation (yield 0.52% w/w) and analyzed using GC-MS, which identified 18 compounds representing 97.84% of the total oil composition. Cinnamaldehyde was the predominant component (68.42%), followed by linalool (5.14%), α-terpineol (3.76%), and eugenol (2.85%). Antibacterial activity was evaluated against Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative) using disc diffusion and broth dilution methods. The essential oil exhibited concentration-dependent inhibition, with larger inhibition zones against S. aureus (up to 18.3 mm at 10% concentration) compared to E. coli (14.7 mm). Minimum inhibitory concentrations (MIC) were 0.5% (v/v) for S. aureus and 1.0% (v/v) for E. coli. These findings demonstrate that West Sumatran C. burmannii essential oil, rich in cinnamaldehyde, possesses significant antibacterial potential, particularly against Gram-positive bacteria, supporting its use as a natural antibacterial agent.