Tuesday, 17 November 2020 10:36

Chemical Composition of Azadirachta indica A. Juss and Ricinus communis Linn. Seed Oils Growing in Marigat, Baringo County, Kenya

Written by *A. J. Kiplagat, C. I. Maina, and P. K. Bett
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*A. J. Kiplagat, C. I. Maina, and P. K. Bett

1 Department of Biological Sciences, Egerton University,

P.O Box 536-20115, Njoro, Kenya.

*Corresponding Author: annkiplagat@gmail.com: +254724662725


A laboratory study was conducted to determine chemical composition of Azadiractin indica   and Ricinus communis seed oils grown in Marigat, Baringo County, Kenya . Seed oils of A. indica and R. communis were   extracted from mature dried seeds by cold pressing and boiling respectively and chemical compositions were determined using Gas Chromatography (GC)-Mass Spectrometry (MS).  The constituents of both seed oils were dominated by saturated and unsaturated fatty acids, cyclic esters and methyl esters. The predominant constituents of R. communis were (Z)-6-Octadecenoic acid (37.33%), Ricinoleic acid (30.22%) and 13-Hexyloxacyclotridec-10-en-2-one (26.67%) while those of A. indica were 2-hexyl-1-decanol (30.97%), Octadecanoic acid (29.69%) and Oxalic acid, 6-ethyloct-3-yl ethyl ester (15.55%). Oils contained Hexadecanoic acid and Octadecanoic acid which are known to play vital role in manufacture of products such as candles, soaps, lotions, perfumes and cosmetic products. Octadecenoic acid is important in human health and diseases and Ricinoleic acid in production of alkyd resins for surface coating and biofuel.  From the results, the seed oils of A. indica and R. communis have chemical constituents with potential applications in agricultural, industrial, comestics and pharmaceutical sectors.


Keywords: Azadirachta indica, Ricinus communis, seed oil, GC-MS, chemical constituents

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