Chemical composition of essential oil of Psidium guajava L. growing in Tunisia

The chemical composition of the essential oils from leaves and stems of Psidium guajava, grown in Tunisia were determined by gas chromatography coupled to mass spectrometry GC–MS. Twenty-one compounds were determined. The major compounds identified in the oil of the stems were α-humulene (10.93%), Germacrene D (16.79%) and Valerenol (10.62%), whereas leaf oil was dominated by Veridiflorol (36.4%) and Trans-caryophyllene (5.9%). The yield of the oil was 0.66% (v/w).