Evaluation of Saponification value, Iodine value and Insoluble impurities in Coconut Oils from Jomoro District of the Western Region of Ghana


  • William Odoom Koforidua Polytechnic, Koforidua, Ghana.
  • Vida Opoku Edusei


Coconut oil, Insoluble impurities, Iodine value, Saponification value,


The study evaluated saponification value(SV), iodine value (IV) and insoluble impurities of coconut oils produced in the Jomoro District of the Western Region of Ghana. Three samples of coconut oil were collected from each of the four (4) major processing centres (EZN, KAB, NAW and NUB) in Ghana for quality determination. Three replicate titre values of each of the twelve (12) oil samples were obtained and the averages were taken into consideration. The AOCS and Cocks et al methods were used in the analyses and the results compared with two International Standards, namely Asian and Pacific Coconut Community (APCC) and Codex Alimentarius (2005). The result showed that the mean SVs of oil from all the processing centres constituting 100% did not meet the APCC standard; however, 25% (NUB) were within the stipulated limits recommended by Codex. The mean iodine value (IV) of the oils from three centres (EZN, KAB and NAW) constituting 75% fell within the APCC while 25% (NUB) did not. For the Codex, 25% (NAW) met the standard while 75% (EZN, KAB and NUB) did not. Also, the amount of insoluble impurities found in oil from all the processing centres did not meet both the APCC and the Codex standards.   The ANOVA at LSD (0.05) showed   significant differences among the processing centres. The results imply that in general, the quality of coconut oil in terms of the parameters considered fell short of both the Codex and APCC standards. Therefore, further improved processes are required to enhance the quality of oil produced to meet the required international standards.


Author Biography

William Odoom, Koforidua Polytechnic, Koforidua, Ghana.

Food and Postharvest Technology Department, Lecturer.


Lawson, H. W., 1985. Standards for Fats and Oils, AVI Publishing Company, Westport,Connecticut.

Kirk, R. and Sawyer R. 1991. Pearson’s composition and analysis of foods.9th edition, Addison Wesley longman ltd. England. pp. 9- 29, 608-640.

Nielson SS. 1994. Introduction to the chemical analysis of foods. Chapman and Hall, New York. 93-207.

Aurand, L.W., Wood, A. E., Wells, M.R. 1987. Food composition and analysis. Van Nostrand Reinhold, New York, pp. 20-33, 181-220.

Abayeh, O.J., Aina, E.A. and Okuonghae, C.O. 1998. Oil content and oil quality characteristics of some Nigerian oil seeds. J. Pure and Applied Sci. 1: 17-23.

Asiedu, J.J. 1989. Processing Tropical Crops. A Technological Approach. MacMillan Publishers, London, pp. 170-172, 226-246.

Kapila, N., Seneviratne and D.M.S., Dissanayake, 2005. Effect of Method of Extraction on the Quality of Coconut oil. J. Sci. Univ., Kelaniya 2: 63-72.

Pomeranz Y and Meloan CE. 1987. Food analysis: Theory and Practice. 2nd ed. Van Nostrand Reinhold Company, New York. 81-765.

Cocks, L. V., Rede Van, C. 1966. Laboratory Handbook for Oil and Fat Analysis. Academic Press Inc., London and New York, pp. 80-129.

Duel, H.J., Tr. 1951. The lipids: their Chemistry and Biochemistry Vol. 1 New York Inter Science Publishers pp: 53-57.

Knothe, 2002; Kyriakidis and Katsiloulis, 2000. In: Atsu Barku, V.Y., Nyarko, H.D. and Dordunu, P., 2012. Studies on the physicochemical characteristics, microbial load and storage stability of oil from Indian almond nut. Food science and quality management, IISTE Journal Vol. 8.

Frederick, W.K. Jr., Fred, E. B., and Fred, S.S., 1954. Impurities in Vegetable oil refining soap stock. Journal of the American Oil Chemist’s Society: pp298-302.

AOCS. 1993. Official Methods and Recommended Practices of the American Oil Chemists’ Society, AOC Press. Washington, DC.

CODEX Alimentarius Commission, 2005 Codex standard for named vegetable oils-‘’Codex stan 210-1999’’.Food and Agricultural Organisation of the United Nations and the World Health Organisation.

Kirschenbauer, H. G. 1965. Fats and Oil: An outline of their Chemistry and Technology. 2nd Edition.

Agbaire P.O., 2012. Quality assessment of palm oil sold in some major markets in Delta State, southern. African Journal of Food Science and Technology 3: 223-226.




How to Cite

Odoom, W., & Edusei, V. O. (2015). Evaluation of Saponification value, Iodine value and Insoluble impurities in Coconut Oils from Jomoro District of the Western Region of Ghana. Asian Journal of Agriculture and Food Sciences, 3(5). Retrieved from https://ajouronline.com/index.php/AJAFS/article/view/2938