Comparision of volatile oil constituen of two species of kunci pepet (Kaempferia angustifolia Roscue. and K. rotunda Linn.)

Abstract

Abstract. Two kunci pepet species, i.e. K. angustifolia and K. rotunda (Zingiberaceae), had different aromas. We analyzed volatile oils of two species by gas chromatography-mass spectrometry (GC-MS). The volatile oils are obtained by water-steam distillation. The GC chromatograms of K. angustifolia showed 16 compounds, 6 compounds of them were the main compounds, i.e., cycloproazulene (21.86%), alloaromadendrene (20.79%), cyclopropnaphtalene (11.02%), (-)b-elemenene (16.00%), caryophyllene (16.00%), and isobornyl acetate (11.02%). The GC-MS chromatograms of K. rotunda showed 10 compounds, 2 compounds were the main compound, i.e., tetradecane (26.85%) and benzylbenzoic (55.46%). Based on the chemical constituent of volatile oils, the two species of Kaempferia had a similarity of 25.00-37.50%. Alloaromadendrene of K. angustifolia and benzylbenzoic of K. rotunda could be used to distinguish the two species of Kaempferia.