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Characterisation of pear distillates from wild and cultivated varieties in Sardinia

Versini, Giuseppe and Franco, Mario Andrea and Moser, Sergio and Manca, Gavina (2012) Characterisation of pear distillates from wild and cultivated varieties in Sardinia. International Journal of Food Science & Technology, Vol. 47 (12), p. 2519-2531. eISSN 1365-2621. Article.

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DOI: 10.1111/j.1365-2621.2012.03130.x

Abstract

The aroma fraction of Italian distillates of wild (Pyrus amygidaliformis, Vill., namely ‘Pirastru’) and cultivated (Pyrus communis, L. cvs. ‘Coscia’, ‘Precoce di Fiorano’ and ‘Butirru de Austu’) pear varieties grown in the northern part of the island of Sardinia was investigated. Distillates from fermented mashes were obtained from the same producer and, in most cases, for 3 years following the same production process. Aroma analyses were performed by GC-FID and GC-MS techniques with direct GC injection of full proof distillates. Differences were found in the aromatic profile of all the distillates depending on their varietal origin. Wild Pirastru pear distillates were the richest in isoeugenol (0.186 g hL-1 a.a.), ethyl benzoate (0.388 g hL-1 a.a.) and ethyl phenylacetate (0.12 g hL-1 a.a.) but the poorest in 1-hexanol (2.69 g hL-1 a.a.), n-hexyl acetate (0.07 g hL-1 a.a.), ∑-farnesene isomers (0.80 g hL-1 a.a.) and citronellol (0.007 g hL-1 a.a.). Pirastru distillates were also the poorest in methyl and ethyl unsaturated decanoate isomers, the socalled Williams pear esters (0.002 g hL-1 a.a.). On the contrary, these compounds that characterise the aroma of Williams pear distillates were abundant in Coscia spirits (1.032 g hL-1 a.a.). The latter, together with Precoce di Fiorano, were rich in farnesene isomers (6.48 and 9.26 g hL-1 a.a. respectively). Evaluation of the data by univariate (ANOVA and Kruskal–Wallis) and multivariate (PCA and HCA) statistical analyses revealed that some components (the classes of acetates, farnesene isomers, methyl and ethyl unsaturated decanoate esters and citronellol) are relevant in discriminating the distillates according to variety.

Item Type:Article
ID Code:8082
Status:Published
Refereed:Yes
Uncontrolled Keywords:Distillates, GC-FID and GC-MS aroma analysis, pear varieties, statistical analysis, wild pear
Subjects:Area 13 - Scienze economiche e statistiche > SECS-P/13 Scienze merceologiche
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Chimica e Farmacia
001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Scienze economiche e aziendali
Publisher:Blackwell / Wiley
eISSN:1365-2621
Copyright Holders:© 2012 The Authors, International Journal of Food Science and Technology © 2012 Institute of Food Science and Technology
Deposited On:23 Oct 2012 12:11

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