Articles
COMPARATIVE ESSENTIAL OIL COMPOSITION AND ANTIOXIDANT ACTIVITY OF FLOWERS, LEAVES AND STEMS OF ROSE-SCENTED GERANIUM (PELARGONIUM GRAVEOLENS L’HÉR.) FROM TUNISIA
Article number
997_13
Pages
111 – 116
Language
English
Abstract
The chemical composition of the essential oils of flowers, leaves and stems from rose-scented geranium (Pelargonium graveolens LHér.) have been examined by GC-MS. The main constituents of the essential oil of flower, leaves and stem oils, respectively were: β-citronellol (20.94, 16.24 and 12.72%), geraniol (13.53, 15.30 and 10.39%), citronellyl format (10.54, 7.39 and 7.47%) and geranyl formate (6.75, 6.47 and 7.33%). The δ-selinene (13.62%) was identified as the highest main constituent, while the γ-eudesmol is absent in stem oil.
For the evaluation of the antioxidant activity, two different methods were employed: the 2,2-diphenyl-1-picrylhydrazyl radical scavenging method (DPPH) and ferric reducing antioxidant power assay (FRAP). These two methods showed that essential oils of flower, leaves and stems possessed antioxidant property comparable with that of the acid ascorbic and butylated hydroxytoluene (BHT).
For the evaluation of the antioxidant activity, two different methods were employed: the 2,2-diphenyl-1-picrylhydrazyl radical scavenging method (DPPH) and ferric reducing antioxidant power assay (FRAP). These two methods showed that essential oils of flower, leaves and stems possessed antioxidant property comparable with that of the acid ascorbic and butylated hydroxytoluene (BHT).
Authors
M. Boukhris, M. Bouaziz, S. Sayadi
Keywords
P. graveolens, flowers, leaves, stems, chemical composition, essential oil, antioxidant activity
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