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J Food Sci Technol. 2019 Jun;56(6):3109-3116. doi: 10.1007/s13197-019-03810-w. Epub 2019 May 16.

Effects of chemical refinement on the quality of coconut oil.

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1International Joint Research Laboratory for Lipid Nutrition and Safety, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi, 214122 Jiangsu People's Republic of China.
Food and Drug Inspection and Testing Center, Puyang, 457000 People's Republic of China.


Refinement is usually used to remove undesired components to improve coconut oil quality. In the present study, crude coconut oil (CCO) was refined in four stages: conventional degumming, neutralization, bleaching, and deodorization. Physiochemical indices during the refinement were evaluated: peroxide value (PV), free fatty acid (FFA), fatty acid composition; fat composition; triacylglycerol profile, micronutrient (e.g., tocopherols and sterols) and contaminant (e.g., 3-monochloropropane-1,2-diol esters (3-MCPD esters), and glycidyl esters (GEs) levels. Compared to CCO, the quality of refined oil was improved by reducing PV and FFA levels. No significant changes in triacylglycerol compositions were found during refinement. However, unsaturated fatty acids like oleic and linoleic acids were decreased after refinement. Also, some micronutrients like tocopherol and sterol were decreased from 12.39 to 0.10 mg/kg and from 679.69 to 426.50 mg/kg, respectively. The undesired contaminants, i.e., 3-MCPD esters and GEs, increased markedly during refinement.


Coconut oil; Contaminant; Fatty acid composition; Micronutrient; Oil refinement; Triacylglycerol

[Available on 2020-06-01]

Conflict of interest statement

Conflict of interestNo conflict of interest exits in the submission of this manuscript, and manuscript is approved by all authors for publication.

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