Analysis of volatile compounds in the root peel, stem peel, and fruit peel of pomegranate (Punica granatum) by TD GC/MS

Abstract

Volatile components in the root peels, stem peels, and fruit peels of pomegranate (Punica granatum) were analyzed by thermal desorption gas chromatography/mass spectrometry (TD GC/MS). Twenty-four compounds including 17 hydrocarbons, 1 aldehyde, 1 ketone, 2 heterocyclics, and 3 others were identified in the root peels. Thirty compounds including 5 hydrocarbons, 8 alcohols, 3 aldehydes, 2 ketones, 11 esters, and 1 other were identified in the stem peels. Sixty-two compounds including 10 hydrocarbons, 18 alcohols, 6 aldehydes, 4 ketones, 1 carboxylic acid, 17 esters, 1 heterocyclic, and 5 others were identified in the fruit peels. Monoterpene hydrocarbons such as α-pinene (13.49%), 2-β-pinene (16.31%), δ-3-carene (22.94%), and dl-limonene (17.33%) were found to be the major volatile compounds in the root peels. The main volatile compound in the stem peels and fruit peels was ethanol of alcohol, which represented 40.76% and 42.12% of the total concentration of volatiles, respectively. Other compounds dominating the stem peels and fruit peels were all acetic acids and ethyl ester of ester, which represented 21.29% and 19.59% of the total concentration of volatiles, respectively. © 2014 SERSC.