Browsing by Author "Marikkar, J.M.N."

Now showing 1 - 4 of 4
  • Thumbnail Image
    Item
    Distinguishing Coconut Oil from Coconut Paring Oil using Principle Component Analysis of fatty Acid Data
    (2012) Marikkar, J.M.N.; Nasyrah, A.R.
    A study was carried out to distinguish coconut oil from coconut pairing oil by the application of principal component analysis (PCA) to fatty acid compositional and iodine value data.Five samples of ordinary coconut oil extracted from five different batches of copra and five samples of coconut pairing oil obtained from five batches of dried coconut pairings were employed.Fatty acid composition and iodine values of oil samples were determined individually and the data were analyzed statistically. PCA analysis showed that lauric and oleic acid contents and iodine value data are the most influencing parameters to discriminate coconut oil from coconut pairing oil. Hence,the application of PCA to fatty acid compositional and iodine value data was successful in distinguishing coconut oil from coconut pairing oil.
  • Thumbnail Image
    Item
    Effect of different levels of fortification of wheat flour with defatted coconut flour on the quality of fibre enriched biscuits
    (2007) Marikkar, J.M.N.; Jayasundara, J.M.M.A.; Rupanjali, A.P.D.; Fernandopulle, M.N.D.
  • Thumbnail Image
    Item
    Fortification of coconut oil with sesame oil through micro expeller extraction process
    (2007-06-11) Marikkar, J.M.N.; Jayasundara, J.M.M.A.; Fernando, W.S.R.; Peiris, T.S.G.
    Value addition to coconut oil is highly desirable in order to increase the range of coconut products.A study was conducted to formulate palatable coconut oil(CNO) blends enriched with essential fatty acid(EFA) using sesame seed as the supplementary source of EFA.For this purpose,micro-expelling process was employed to extract oil blends out of the dried coconut grating mixed with various proportion of sesame seed(w/w;0,1,2,3,4,5,7 and 10).A sensory evaluation by a 30 member semi-trained panel was conducted using a seven-point hedonic scale in order to determine the critical limit of CNO fortification with sesame.Similarly, changes in fatty acid composition were determined using Gas Liquid Chromatography (GLC).Statistical analysis of the sensory data showed that a mild order of sesame started to appear in the oil blends at 4% lavel of sesame mixed with dried coconut gratings.According to fatty acid methyl ester(FAME) analysis,the relative increase in linoleic acid was only marginal although there was a substantial increase in unsatturated fatty acid component.At 5% level of fortification the increment in linoleic acid was 9.2%.
  • Thumbnail Image
    Item
    A Predictive Model for Determination of the Iodine Value of Coconut Oil by GLC Analysis of the Component Fatty Acids
    (2008) Marikkar, J.M.N.; Jayasundera, J.M.M.A.; Kumari, A.G.O.; Waidyarathana, K.P.
    A study was conducted to develop a predictive model for determination of iodine value (IV) of coconut oil using gas liquid chromatographic (GLC) analysis of the component fatty acids (FA). Altogether twenty-six samples were selected to represent three sub-categories of coconut oil, namely ordinary coconut oil, virgin coconut oil, and coconut paring oil. Out of the twenty-six, fifteen samples were used as a calibration set while the remaining eleven samples were kept for validation purpose. All twenty-six samples were analyzed for iodine value using the AOCS method Cd Id-92 and for FA composition using GLC detection of fatty acid methyl esters (FAME). Pearson correlation analysis between IV and individual FA indicated that lauric (Ci2:o), myristic (Ci4;o), palmitic (Ci6:o), oleic (Cis:i) and linoleic (Cm) were the five parameters having strong correlation with the iodine values. When these five parameters were used as independent variables in a step wise regression procedure, a predictive model for iodine value was obtained with Cisioand Cisn as independent variables (coefficient of determination, R1 — 0.9611 and standard error, SE=0.93). When the model was validated with an independent set of eleven samples, the coefficient of determination was 0.946 with an overall SE of 0.95. The study concludes that the iodine value measured by the GLC method was comparable to that obtained by AOCS method Cd Id- 92.