Njoku and Evbuomwan
Greener Journal of Chemical Science and Technology Vol. 1 (1), pp. 006-014, May 2014.
ISSN: 2384-6364 © 2013 Greener Journals
Manuscript Number: 041414185
Analysis and Comparative Study of Essential Oil Extracted from Nigerian Orange, Lemon and Lime Peels
*V.I. Njoku, B.O. Evbuomwan
Department of Chemical Engineering, college of Graduate Studies, University of Port Harcourt, Choba, Nigeria.
*Corresponding Author’s Email: letsbeconnected @ yahoo. com, Phone: +2348037733196
Essential oils are a product obtained from vegetable raw materials and are complex mixtures whose composition may include volatile terpenic compounds. In this study, the relationship between time and amount of essential oil extracted from the citrus peels using steam distillation was shown. Orange peel was shown to contain more amount of essential oil (20ml at 180minutes) than lemon (7ml at 180minutes) and lime (5ml at 180minutes).Using GC-MS analysis, 11, 12 and 24 chemical constituents were identified in orange, lemon and lime essential oil respectively. The 3 main components and their percentage compositions are D-Limonene (54.151%), Pulegone (11.652%) and L-Carvone (2-cyclohexen-1-one) (5.457%) for orange peel essential oil, D-limonene (64%), 2-cyclohexen-1-ol (6.21%) and β-Pinene (3.822%) for lemon peel essential oil, and β-Pinene (23.124%), D-limonene (17.07%) and α-Pinene (10.399%) for lime essential oil. D-limonene was the most prevalent chemical constituent in orange and lemon essential oil, but β-Pinene was the most prevalent in lime peel essential oil. Although lemon contained more D-limonene per unit volume of essential oil, application of these percentages on the volume of essential oil obtained from 370g of the peels at 180minutes showed that orange peel can deliver more D-limonene per unit mass of available peel. Hence, orange peel essential oil is a more economical source of D-limonene in Nigeria.
Keywords: Quantitative, Analysis, Qualitative, Comparative, Extracted, Essential oil, Orange, Lemon, Lime.