title: [Investigation of ochratoxin a, B and citrinin contamination in various commercial foods].
abstract: Ochratoxin A (OTA), ochratoxin B (OTB) and citrinin (CIT) in commercial foods were simultaneously determined and confirmed with high-performance liquid chromatography (HPLC) and liquid chromatography coupled with tandem mass spectrometry (LC/MS/MS). The samples examined were made up of cereal, fruit, coffee, and cacao products. The limits of quantification (S/N> or =10) of OTA, OTB and CIT were 0.1 microg/kg or less. Aflatoxins (AF), deoxynivalenol (DON) and fumonisins were also surveyed. Of 157 samples examined, 44 were contaminated with OTA at levels of 0.11 to 4.0 microg/kg. At least 2 positive samples were labeled as domestics. In most positive samples, the OTA level was low, less than 1 microg/kg. The highest incidence of OTA was observed in cacao powder (10/12), followed by instant coffee (5/7), cocoa (5/8) and raisin (6/13). OTB was found in fruit and cacao products containing relatively high levels of OTA. Co-occurrence of OTA, CIT and DON was found in cereal products, and co-occurrence of OTA and AF was found in cacao products. Approximately 30% of naturally contaminated OTA in roasted coffee bean moved into the extract solution when brewed with paper filter.
authors.affiliation: Tokyo Metropolitan Institute of Public Health, Tokyo, Japan.
authors.forename: Setsuko
authors.initials: S
authors.lastname: Tabata
authors.forename: Kenji
authors.initials: K
authors.lastname: Iida
authors.forename: Keisuke
authors.initials: K
authors.lastname: Kimura
authors.forename: Yumiko
authors.initials: Y
authors.lastname: Iwasaki
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Nakazato
authors.forename: Kunihiro
authors.initials: K
authors.lastname: Kamata
authors.forename: Masako
authors.initials: M
authors.lastname: Hirokado
mesh_terms: D000348:Aflatoxins / Q000032:analysis; D002099:Cacao / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid; D002853:Chromatography, Liquid; D002953:Citrinin / Q000032:analysis*; D003069:Coffee / Q000737:chemistry; D002523:Edible Grain / Q000737:chemistry; D005504:Food Analysis / Q000379:methods*; D005506:Food Contamination / Q000032:analysis*; D005638:Fruit / Q000737:chemistry; D037341:Fumonisins / Q000032:analysis; D009793:Ochratoxins / Q000032:analysis*; D053719:Tandem Mass Spectrometry; D014255:Trichothecenes / Q000032:analysis
chemical_list: D000348:Aflatoxins; D003069:Coffee; D037341:Fumonisins; D009793:Ochratoxins; D014255:Trichothecenes; C025589:ochratoxin A; D002953:Citrinin; C045354:ochratoxin B; C007262:deoxynivalenol