Fatty Acid Profile and Physico-Chemical Parameters of Castor Oils in Tanzania

Athumani Omari; Quintino A. Mgani; Egid B. Mubofu

doi:10.4236/gsc.2015.54019

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Green and Sustainable Chemistry > Vol.5 No.4, November 2015

Fatty Acid Profile and Physico-Chemical Parameters of Castor Oils in Tanzania ()

Athumani Omari¹, Quintino A. Mgani², Egid B. Mubofu^2*

¹Department of General Studies, Arusha Technical College, Arusha, Tanzania.
²Chemistry Department, University of Dar es Salaam, Dar es Salaam, Tanzania.

DOI: 10.4236/gsc.2015.54019 PDF HTML XML 4,706 Downloads 5,983 Views Citations

Abstract

This paper reports on the assessment of the quality and quantity of castor oil from castor seeds collected from different regions in Tanzania. The castor seeds from Arusha, Dar es Salaam, Dodoma, Iringa, Kagera and Morogoro regions in Tanzania were extracted by Soxhlet method using n-hexane and the oil yields were determined. The yields were 52.78%, 49.95%, 47.89%, 44.23%, 43.71% and 43.69% for Dodoma, Arusha, Iringa, Morogoro, Kagera and Dar es Salaam respectively. The physico-chemical parameters that were determined were refractive index (1.468 - 1.473), pH 5.7- 6.3, viscosity (0.943 - 0.954), specific gravity (165.50 - 187.46 mg KOH/g Oil), saponification value (76.68 - 80 mg KOH/g Oil), iodine value (76.68 - 80.12 g I₂/100 g Oil), acid value (0.44 - 1.97 mg NaOH/g Oil), free fatty acid (0.22 - 0.99) and peroxide value (10.79 - 13.73). Fatty acid profile of castor oil was analysed using Shimadzu GCMS and ricinoleic acid ranged from 83.5% to 92.3% of the total fatty acids in the castor oils.

Keywords

Castor Oil, Fatty Acid Profile, Characterization

Share and Cite:

Omari, A. , Mgani, Q. and Mubofu, E. (2015) Fatty Acid Profile and Physico-Chemical Parameters of Castor Oils in Tanzania. Green and Sustainable Chemistry, 5, 154-163. doi: 10.4236/gsc.2015.54019.

Conflicts of Interest

The authors declare no conflicts of interest.

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