Analysis of some Italian lemon liquors (limoncello).
The chemical composition of several commercial Italian Limoncellos, lemon-peel-based alcoholic beverages, was studied by chromatographic techniques. These methods allowed a rapid monitoring of Limoncello, giving information on quality markers and possible adulteration of the product. Quantitative data for more than 60 compounds are reported. Limoncellos were characterized by the presence of selected volatile (terpenes, aldehydes, alcohols) and nonvolatile compounds (psoralens, coumarins, phenolics, carbohydrates and acids). On the basis of their composition, the samples were grouped by PCA analysis in two sets; the first group showed a composition similar to lemon essential oils, with a high content of b-pinene, myrcene, trans-a-bergamottene, and b-bisabolene, and a low content in neral and geranial. The composition of the second group suggested the occurrence of oxidative phenomena and/or the addition of flavors. The presence of ethyl acetate, acetaldehyde, 2-methyl-1-propanol and glycerol showed that a fermentation probably occurred in the sugar syrup used to dilute the Limoncello after the extraction process.
Andrea
Versari
V
Dipartimento di Scienze degli Alimenti, Università di Bologna, via Ravennate 1020, Cesena (FC) 47023, Italy.
Nadia
Natali
N
Teresa
Russo Maria
RM
Andrea
Antonelli
A
D000434:Alcoholic Beverages / Q000032:analysis*; D000438:Alcohols / Q000032:analysis; D002241:Carbohydrates / Q000032:analysis; D002851:Chromatography, High Pressure Liquid; D002957:Citrus / Q000737:chemistry*; D003374:Coumarins / Q000032:analysis; D005285:Fermentation; D005638:Fruit / Q000737:chemistry*; D011564:Furocoumarins / Q000032:analysis; D007558:Italy; D010084:Oxidation-Reduction; D010636:Phenols / Q000032:analysis; D014835:Volatilization
D000438:Alcohols; D002241:Carbohydrates; D003374:Coumarins; D011564:Furocoumarins; D010636:Phenols