The detection of markers of identification of the geo- graphical origin of food is an attractive challenge and, as far as dairy products are concerned, this paper repre- sents a contribution to this field. In this research the influence of feed on the volatile compound composition was investigated on milk, 2-mo-old cheese (Caciotta), and whey cheese (ricotta) obtained from the same flock of Sarda ewes, under standardized technological condi- tions. Three different types of pasture (mixture of Lol- ium perenne and Trifolium squarrosum; rough pasture; Avena sativa) were studied. Solid-phase microextrac- tion combined with gas chromatography-mass spec- trometry was used and principal component analysis was applied for statistical evaluation of the data set. The volatile composition was significantly affected by the type of pasture independently of the type of cheese and the ripening period. Moreover, a marker of rough pasture, tentatively identified as (E,E)-3,7,11-tri- methyl-2,4,10-dodecatriene, was detected only in milk and cheeses produced when the ewe flock grazed on that pasture.
|Autori:||POVOLO M; CONTARINI G; MELE M; SECCHIARI P|
|Titolo:||Study on the Influence of Pasture on Volatile Fraction of Ewes’ Dairy Products by Solid-Phase Microextraction and Gas Chromatography-Mass Spectrometry|
|Anno del prodotto:||2007|
|Appare nelle tipologie:||1.1 Articolo in rivista|