title: Inter-laboratory study of an LC-MS/MS method for simultaneous determination of fumonisin B1, B2 and B3 in corn.
abstract: To validate an LC-MS/MS method using a strong anion exchange cartridge for simultaneous determination of fumonisin B1, B2 and B3 in corn, an inter-laboratory study was performed in 9 laboratories using one fumonisin-negative corn sample, three spiked corn samples (FB1: 100-1,000 μg/kg, FB2 and FB3: 10-100 μg/kg) and two naturally contaminated corn samples. The recoveries were in the ranges of 79.7-87.2% for FB1, 78.6-103.2% for FB2 and 80.1-92.8% for FB3. The relative standard deviations for repeatability (RSDr) ranged from 3.7 to 8.0% for FB1, from 2.6 to 15.3% for FB2 and from 4.3 to 9.7% for FB3. The relative standard deviations for reproducibility (RSDR) for FB1, FB2 and FB3 were in the ranges of 6.3-10.1%, 5.9-18.7% and 9.3-16.0%, respectively. The HorRat values for all analytes ranged from 0.2 to 0.9. The difference of the trueness between the two kinds of commercially available anion exchange cartridges used in this study was not significant (p>0.05). Surveillance for fumonisins in corn grits was performed using the validated method. All of the samples were contaminated with fumonisins and the mean concentrations for FB1, FB2 and FB3 were 118.1, 37.3 and 17.9 μg/kg, respectively. These results indicated that the method for simultaneous determination of FB1, FB2 and FB3 in corn was successfully developed and validated.
authors.affiliation: National Institute of Health Sciences.
authors.forename: Tomoya
authors.initials: T
authors.lastname: Yoshinari
authors.forename: Toshitsugu
authors.initials: T
authors.lastname: Tanaka
authors.forename: Eiichi
authors.initials: E
authors.lastname: Ishikuro
authors.forename: Masakazu
authors.initials: M
authors.lastname: Horie
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Nagayama
authors.forename: Masahiro
authors.initials: M
authors.lastname: Nakajima
authors.forename: Shigehiro
authors.initials: S
authors.lastname: Naito
authors.forename: Takahiro
authors.initials: T
authors.lastname: Ohnishi
authors.forename: Yoshiko
authors.initials: Y
authors.lastname: Sugita-Konishi
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods* / Q000592:standards*; D005504:Food Analysis / Q000379:methods* / Q000592:standards*; D005506:Food Contamination / Q000032:analysis*; D037341:Fumonisins / Q000032:analysis*; D059021:Laboratory Proficiency Testing / Q000379:methods* / Q000592:standards*; D053719:Tandem Mass Spectrometry / Q000379:methods* / Q000592:standards*; D013723:Teratogens / Q000032:analysis*; D003313:Zea mays / Q000737:chemistry*
chemical_list: D037341:Fumonisins; D013723:Teratogens; C056934:fumonisin B2; C073063:fumonisin B3; C056933:fumonisin B1