Comparative Study of the Physicochemical Characterization of Some Oils as Potential Feedstock for Biodiesel Production

Table 2

Chemical properties of Brachystegia eurycoma, Cucurbita pepo, Luffa cylindrica, Cucumis melo, and Arachis hypogea seed oils.

S/N	Properties	Brachystegia eurycoma	Cucurbita pepo	Luffa cylidrica	Cucumis melo	Arachis hypogea oil	ASTM D6751-02
1	pH	5.30	5.65	5.59	6.07	—	—
2	Ash content (%)	2.10	1.86	0.50	2.77	Trace	0.02 max
3	Iodine value (g/100 g)	132.61	150.37	66.37	135.36	89.46	—
4	Acid value (mgKOH/g)	27.08	36.47	2.47	5.40	2.61	0.8 max
5	Saponification value (mgKOH/g)	93.27	162.69	65.92	112.19	148.67	—
6	Peroxide value (meq/kg)	4.36	5.66	9.37	9.83	22.25	—
7	Free fatty acid (%)	13.54	18.23	1.23	2.525	1.31	—
8	Flash point (^°C)	288.00	312.00	338.00	298.00	178.00	130.00 min
9	Kinematic viscosity (mm^2/s)	0.13	0.70	0.92	0.81	32.66	1.90–6.00
10	Refractive index	0.91	0.73	0.75	0.71	1.46	—