title: Liquid chromatography-tandem mass spectrometry analysis of 2-amino-1-methyl-6-(4-hydroxyphenyl)imidazo[4,5-b]pyridine in cooked meats.
abstract: Several cooked meats such as beef (fried, coated-fried), pork (fried, coated-fried), and chicken (fried, griddled, coated-fried, roasted) were analyzed for the heterocyclic amine 2-amino-1-methyl-6-(4-hydroxyphenyl)imidazo[4,5- b]pyridine (4'-OH-PhIP) not commonly determined in food and 2-amino-1-methyl-6-phenylimidazo[4,5- b]pyridine (PhIP). The highest content of 4'-OH-PhIP was found in fried and griddled chicken breast, the concentration being 43.7 and 13.4 ng/g, respectively, whereas the corresponding PhIP concentrations were 19.2 and 5.8 ng/g. The estimated concentration of both pyridines in fried pork loin, in fried pork sausages, and in coated-fried chicken was below 2.5 ng/g. In the rest of the samples, 4'-OH-PhIP was not detected. The analyses were performed by solid-phase extraction and LC-MS/MS. The fragmentation of 4'-OH-PhIP in an ion trap mass analyzer was studied in order to provide information for the identification of 4'-OH-PhIP. Additionally, the effect of red wine marinades on the formation of 4'-OH-PhIP in fried chicken was examined, finding a notable reduction (69%) in the amine's occurrence.
authors.affiliation: Department of Analytical Chemistry, Chemistry Faculty, University of Barcelona, Martí i Franquès, 1-11, E-08028 Barcelona, Spain.
authors.forename: R
authors.initials: R
authors.lastname: Busquets
authors.forename: L
authors.initials: L
authors.lastname: Puignou
authors.forename: M T
authors.initials: MT
authors.lastname: Galceran
authors.forename: K
authors.initials: K
authors.lastname: Wakabayashi
authors.forename: K
authors.initials: K
authors.lastname: Skog
mesh_terms: D000818:Animals; D002273:Carcinogens / Q000032:analysis*; D002417:Cattle; D002645:Chickens; D002851:Chromatography, High Pressure Liquid; D006358:Hot Temperature; D007093:Imidazoles / Q000032:analysis*; D013058:Mass Spectrometry; D008460:Meat / Q000032:analysis*; D013552:Swine; D014920:Wine
chemical_list: D002273:Carcinogens; D007093:Imidazoles; C049584:2-amino-1-methyl-6-phenylimidazo(4,5-b)pyridine