Comparative characterization of vegetable oils from bulk suppliers/vendors in Nasarawa town market in Nigeria
2022
Musa, Dallatu E. | Mariette, Okorafor L. | Sotonye, Wilson Arthur | Osilama, Akhagbeme John
The comparative characterization of vegetable oils from bulk suppliers/vendors was made in Nasarawa town market in Nigeria. For this a total volume of 400 cm3 vegetable oils were collected (200 cm3 from the top and 200 cm3 from the bottom of storage after stirring) separately into labeled plastic bottles from three major suppliers. Composite of each sample were made and physicochemical properties including densities, temperatures, boiling points, viscosities, refractive indexes free fatty acid, iodine values, saponification values and peroxide values were determined using standard procedures. The results showed the density of sample ranging from 0.91 ± 0.007 to 0.92 ± 0.007 gcm-3; temperature of sample: 27.3 ± 0.578 to 30.3 ± 1.525 ºC; boiling point of sample 230.7 ± 1.528 ºC to 202 ± 2.000 ºC; viscosity of sample A: 1.03 ± 0.183 to 0.72 ± 0.106 mPa.S; refractive index of sample: 1.47012 ± 0.00002 to 1.45709 ± 0.00005; free fatty acid of sample A: 0.73 ± 0.057 mgKOH/g to 0.6 ± 0.173 mgKOH/g; iodine value of sample: 87.979 ± 5.870 mgKOH/g to 54.144 ± 3.595 mgKOH/g; saponification value of sample: 195.830 ± 0.499 mgKOH/g to 197.846 ± 0.856 mgKOH/g, and peroxide value of sample A: 10.1 ± 0.741 mgKOH/g to 9.9 ± 0.663 mgKOH/g. These parameters were also compared with the standards prescribed by NAFDAC and SON, which suggest that the sampled oil is suitable for consumer use. Thus, processing of vegetable oils from industrial and locally/traditionally extracted vegetable oils and vegetable oils supplied by the three vendors in the Nasarawa town market are hereby recommended as long as the suppliers maintain the standards of production, packaging and handling.
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