title: Sterigmatocystin presence in typical Latvian grains.
abstract: Ninety five samples of different Latvian grains (wheat, buckwheat, barley, oats and rye) from the year 2006 and 120 samples from the year 2007 were analyzed for Aspergillus ssp. mycotoxin-sterigmatocystin (STC) content. 13.7% of the analyzed 2006 year samples were positive for STC with the concentration levels ranging from <0.7 to 83μg/kg and 35% of the analyzed 2007 year samples were positive for STC with the concentration levels ranging from <1 to 47μg/kg. A previously developed sensitive LC - Electrospray Positive Ionization - MS/MS method was applied for the analysis of STC in grains. Method includes sample extraction with acetonitrile/water solution, solid phase extraction (SPE) on Strata X SPE column, separation on reversed phase C18 column and STC detection by LC-MS/MS.
authors.affiliation: National Diagnostic Centre (NDC), Food and Environmental Investigations Laboratory, Lejupes iela 3, Riga LV - 1076, Latvia; Latvia University of Agriculture, Department of Chemistry, Liela iela 2, Jelgava, LV - 3001, Latvia. Electronic address: aleksandrs.versilovskis@yahoo.com.
authors.forename: Aleksandrs
authors.initials: A
authors.lastname: Veršilovskis
authors.affiliation: National Diagnostic Centre (NDC), Food and Environmental Investigations Laboratory, Lejupes iela 3, Riga LV - 1076, Latvia.
authors.forename: Vadims
authors.initials: V
authors.lastname: Bartkevičs
authors.affiliation: Latvia University of Agriculture, Department of Chemistry, Liela iela 2, Jelgava, LV - 3001, Latvia. Electronic address: velgamik@inbox.lv.
authors.forename: Velga
authors.initials: V
authors.lastname: Miķelsone
keywords: Aspergillus spp.; Aspergillus versicolor; Grains; LC–MS/MS; Mycotoxin; Sterigmatocystin