title: Ratios between content of fatty acids as markers for mixture of cow and goat milk.
abstract: The fat of mixture of goat and cow milk, extracted by di-ethylic ether, was gas chromatographically analysed in order to propose an analytical procedure suitable to reveal small additions of cow milk to goat milk. The obtained results show evident differences in the percentages of some fatty acids. An attempt to apply the peak area ratios, corresponding to the methyl esters of fatty acids, suggested by the literature for cow milk did not yield good results. Other ratios suitable to reveal even the presence of low percentages (up to 5 %) of cow milk in goat milk were found and proposed in this paper. Such ratios are sensitive and can be defined markers towards cow or goat milk and also towards extraneous fat like lard or colza seeds oil.
authors.affiliation: Dipartimento di Chimica dell'Università La Sapienza P.le A. Moro 5, Box n. 34, Roma 62, 00185 Roma, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Antonilli
authors.forename: Emilio
authors.initials: E
authors.lastname: Bottari
authors.forename: Maria Rosa
authors.initials: MR
authors.lastname: Festa
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000032:analysis; D002417:Cattle; D002849:Chromatography, Gas; D004041:Dietary Fats / Q000032:analysis; D004952:Esters / Q000032:analysis*; D004986:Ether / Q000737:chemistry; D005227:Fatty Acids / Q000032:analysis*; D006041:Goats; D008892:Milk / Q000737:chemistry*; D010938:Plant Oils / Q000032:analysis; D012639:Seeds / Q000737:chemistry
chemical_list: D015415:Biomarkers; D004041:Dietary Fats; D004952:Esters; D005227:Fatty Acids; D010938:Plant Oils; D004986:Ether; C029310:lard