Aqueous Extraction and Enzymatic Destabilization of Coconut Milk Emulsions

Raghavendra, S. N. and Raghavarao, K. S. M. S. (2011) Aqueous Extraction and Enzymatic Destabilization of Coconut Milk Emulsions. Journal of the American Oil Chemists Society , 88 (4). pp. 481-487.

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Abstract

Fresh and mature coconuts were subjected to deshelling, paring and disintegration. The coconut milk was extracted, treated with an enzyme (protease) at different concentrations and centrifuged, in order to separate it into coconut cream and aqueous phases. Subsequently, coconut cream was subjected to chilling (different temperatures) and thawing to ambient temperature (29 ± 2 C) followed by centrifugation to obtain a clear virgin coconut oil (VCO). Coconut milk treated with aspartic protease at concentration of 0.02 mg/g, resulted in 90.4 ± 1.2% yield. A maximum yield of 95.3 ± 1.0% was obtained when the treatment of coconut milk with aspartic protease at concentration of 0.02 mg/g was followed by chilling (5 C) and thawing. Physicochemical properties and fatty acid compositions were evaluated and compared with commercial coconut oil samples. It was found that the oil obtained from present study is low with respect to free fatty acids (0.31%) and peroxide value (0.81 mequiv O2/kg) when compared with the commercial coconut oil samples. Sensory evaluation was also carried out to ensure the product acceptability.

Item Type:	Article
Uncontrolled Keywords:	Coconut milk, Enzyme treatment,,Aqueous extraction, Protease, Destabilization, Chilling, Virgin coconut oil
Subjects:	600 Technology > 08 Food technology > 01 Analysis 600 Technology > 08 Food technology > 33 Nuts > 01 Coconut
Divisions:	Food Engineering
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	30 Nov 2010 07:14
Last Modified:	28 Dec 2011 10:20
URI:	http://ir.cftri.res.in/id/eprint/9814

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