Abstract
Free and glycosidically bound volatile compounds in different parts of Eureka lemon were studied. Free volatile compounds were extracted by solid phase microextraction (SPME). Bound volatile compounds were isolated from juice by adsorption onto an Amberlite XAD-2 column, and then hydrolyzed by almond β-glucosidase. Both the free volatile compounds and the released aglycones were analyzed by using gas chromatography-mass spectromerty (GC-MS). Gas chromatography-olfactometry (GC-O) was also used to determine the aroma-active compounds in juice and peel. Totally 29 and 34 free volatiles were found in juice and peel, respectively. Terpenes and aldehydes were the most abundant compounds in free fractions. Four and six bound volatile compounds were found in juice and peel with a total concentration of 127.8 and 1161.52 µg/L. Benzenic and terpenic compounds were the main bound volatiles found in Eureka lemon fruit. Mannose and glucose were found as sugar moiety in juice, and glucose was found the only sugar linked to bound volatiles in peel.
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