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Study on Extraction of Oil from Copra and Evaluation of its Quality Characteristics

Pradeep, P Shanbogh (2010) Study on Extraction of Oil from Copra and Evaluation of its Quality Characteristics. [Student Project Report]

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Abstract

This Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page.

Item Type: Student Project Report
Additional Information: The present work was carried out to study the extraction process of coconut oil from copra and to establish the comparative study of physical and chemical characteristics of different coconut oil samples, which were prepared by various extraction methods. In the present study, solvent extracted Copra oil (CCNO), Hydraulic press Copra oil (HCNO), refined commercial Copra oil (RCNO) and Unrefined Commercial copra oil (UCNO) were used. Study on extraction process reveals that, solvent extraction leads to maximum oil recovery compared to hydraulic press method, the cake obtained after solvent extraction was almost oil free but press cake still contains considerable amount of oil in it. However time required for extracting oil from hydraulic press method was very less; where as in Soxhlet method nearly 6 hours of extraction was required. Physical characterization of the oil samples reveals no significant variation in the values. However colour of the solvent extracted oil was more compared to the other CNO samples, The melting point range of all the CNO samples was found to be in the range of 24o C to 27o C. Freezing point was in the range of 23o C to 22o C. All CNO samples show density value at nearly nearly 0.921 g/cm3 and viscosity value of nearly 5 Centi poise at 25o C. Chemical characterization of the CNO samples reveals that, there was no significant difference in the free fatty acid value of the oil samples. Peroxide value of solvent extracted copra oil was significantly high, where as other CNO samples have zero peroxide value. Thus we may conclude that solvent extracted oil is relatively rancid compared to other CNO samples. Iodine value of the oil samples were in the range of 8 to 10.5 centi gram I2/g oil, this low Iodine Value compared with other oils, indicates CNO is less unsaturated. The saponification value of CNO samples were shown to be in the range of 265 to 269 mg KOH/g Oil. The unsaponifiable matter in the CNO samples are less than 0.5%, from this we can conclude that, the substance other than triglycerides (fatty acids), such as antioxidants, pigments, phytosterols etc., are scarcely available in CNO. Experiments on antioxidant determination reveal that, the concentration of polyphenols were in the range of 2 to 2.7 mg/100g oil. A significantly higher amount of Tocopherol content was observed in hydraulic press CNO oil, hence we can conclude that hydraulic press oil can be stored for longer duration without or less rancidity and also hydraulic press oil can be used as good dietary oil compared to other CNO samples.
Uncontrolled Keywords: coconut oil; extraction process; solvent extracted Copra oil; Chemical characterization
Subjects: 600 Technology > 08 Food technology > 14 Physical properties
600 Technology > 08 Food technology > 19 Lipids-oils/fats
600 Technology > 08 Food technology > 19 Lipids-oils/fats > 02 Coconut
Divisions: Lipid Science and Traditional Foods
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 12 Aug 2010 09:49
Last Modified: 28 Dec 2011 10:17
URI: http://ir.cftri.com/id/eprint/9611

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