title: Differentiation of geographical origin of cream products in Poland according to their fatty acid profile.
abstract: Fatty acid (FA) composition of bovine milk fat from cream samples, originating from three regions of Poland (one mountainous and two lowland ones) and collected within 2 years, was analysed aiming at identifying the region of production by applying principal component analysis (PCA). From the 44 FAs identified by gas chromatography, two groups were discerned: seasonally variable (n=17) and non-seasonal (n=7). The biplots showed that different FAs could serve as markers of geographical origin of cream samples. The CLA, vaccenic acid, C18:39c12c15c, total C18:1 trans and C18:39c12c15c n-6 (GLA) were found indicative of mountainous regions, and the short-chain saturated FAs (SCFA; C4:0-C11:0) - of the lowland ones. The Opole province was characterised by a high content of linoleic acid. It was concluded that the origin of a cream sample could be fairly well identified by gas chromatography combined with chemometric analysis of milk fat FAs.
authors.affiliation: Department of Instrumental Analysis, Faculty of Human Nutrition and Consumer Sciences, Warsaw University of Life Sciences (WULS-SGGW), Nowoursynowska st. 159c, 02-776 Warsaw, Poland. Electronic address: jaroslawa_rutkowska@sggw.pl.
authors.forename: Jaroslawa
authors.initials: J
authors.lastname: Rutkowska
authors.affiliation: Department of Instrumental Analysis, Faculty of Human Nutrition and Consumer Sciences, Warsaw University of Life Sciences (WULS-SGGW), Nowoursynowska st. 159c, 02-776 Warsaw, Poland.
authors.forename: Malgorzata
authors.initials: M
authors.lastname: Bialek
authors.affiliation: Department of Instrumental Analysis, Faculty of Human Nutrition and Consumer Sciences, Warsaw University of Life Sciences (WULS-SGGW), Nowoursynowska st. 159c, 02-776 Warsaw, Poland.
authors.forename: Agata
authors.initials: A
authors.lastname: Adamska
authors.affiliation: Department of Food Technology, Faculty of Food Sciences, Warsaw University of Life Sciences (WULS-SGGW), Nowoursynowska st. 159c, 02-776 Warsaw, Poland.
authors.forename: Anna
authors.initials: A
authors.lastname: Zbikowska
mesh_terms: D000818:Animals; D002417:Cattle; D002845:Chromatography / Q000379:methods*; D003611:Dairy Products / Q000032:analysis*; D005227:Fatty Acids / Q000737:chemistry*; D008892:Milk / Q000737:chemistry*; D011044:Poland
chemical_list: D005227:Fatty Acids
keywords: Chromatography; Dairy products; Fatty acids; Geographical origin; Principal component analysis