| The composition and content of volatile components in coconut oils obtained by cold pressing method, supercritical method, subcritical method and solvent extraction method were analyzed by thermal desorption combined with gas chromatography mass spectrometry (TD-GC-MS). The results showed that 83 kinds of volatile components were identified from four kinds of coconut oils, including alcohols, acids, ketones, esters, aldehydes and hydrocarbons. Subcritical extracted coconut oil obtained the largest species of alcohol by the detection, up to eight, and almost no commonality with the other three kinds of coconut oils. Octanoic acid was detected in all the four kinds of coconut oils, and the content was the highest in subcritical extracted coconut oil, up to 58.75%. Ketones and aldehydes were not abundant both in species and content in the four kinds of coconut oils. Species of esters were the most abundant in the four coconut oils. The contents of?δ-octanol lactone and D-limonene were the highest in the solvent extracted coconut oil, up to 21.53% and 2.68% respectively. The content of 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopentane- γ-2-benzopyran was the highest in the supercritical extracted coconut oil, up to 2.86%. |
