Chemical Composition Changes of Main Active Components Accompanying the Conversion of Some Essential Oils (EO) into Essential Oils Nanoemulsion (EONE)

Four essential oils [Sweet Basil (Ocimum basilicum L, Fam: Lamiaceae), Geranium, (Pelargonium graveolens, Fam: Geraniaceae), Lemongrass (Cymbopogon citratus, Fam: Poaceae) and Peppermint (Mentha piperita L. Fam: Lamiaceae)] were selected to be converted into essential oil nanoemulsions (EONE). The four oils were analyzed in their natural (EO) and nano form (EONE) using GC-MS, and the results showed a significant increase in the percentage of the main components of the four oils in their nano form (EONE). The results also indicated an increase in the total content of TPC phenols (12.91, 12.04, 13.78, 12.88 (mg GAE/g)) respectively, as well as an increase in the percentage DPPH% (48.22, 36.21, 44.68 and 30.83%) respectively in the four oils. The results showed that the conversion EO to EONE for the four oils under study had preserved their physical and chemical properties.