title: [Determination of benzimidazole anthelmintics in livestock foods by HPLC].
abstract: A simple and rapid liquid chromatographic method was developed for the simultaneous determination of twelve benzimidazole anthelmintics in livestock foods using reversed-phase high-performance liquid chromatography with photodiode array detection (PDA). A sample was homogenized with acetonitrile and n-hexane, and centrifuged. The acetonitrile phase was isolated and evaporated. The residue was dissolved in 0.1 mol/L carbonate buffer solution (pH = 9.1), sonicated, and then subjected to clean-up on a Bond Elut LRC-C18 cartridge. The benzimidazole compounds were separated isocratically on a Capcell Pak C18 UG 120 (5 microns, 150 x 4.6 mm i.d.) column and detected by PDA at 295 and 313 nm. Mixtures of acetonitrile and 0.05 mol/L ammonium acetate in mixing ratios of (20:80) and (40:60) were used as the mobile phase, and the flow-rate was 1.0 mL/min at 40 degrees C. The mean recoveries (n = 3) from 0.1-0.5 microgram/g added samples were 72.6-97.2% with coefficients of variation of 0.3-8.5%. The detection limits were 0.01-0.05 microgram/g.
authors.affiliation: Tokyo Metropolitan Institute of Public Health: 3-24-1, Hyakunin-cho, Shinjuku-ku, Tokyo 169-0073, Japan.
authors.forename: Kazue
authors.initials: K
authors.lastname: Takeba
authors.forename: Kenji
authors.initials: K
authors.lastname: Fujinuma
authors.forename: Miho
authors.initials: M
authors.lastname: Sakamoto
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Jimbo
authors.forename: Hisao
authors.initials: H
authors.lastname: Oka
authors.forename: Yuko
authors.initials: Y
authors.lastname: Ito
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Nakazawa
mesh_terms: D000818:Animals; D000871:Anthelmintics / Q000032:analysis*; D001562:Benzimidazoles / Q000032:analysis*; D002417:Cattle; D002645:Chickens; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004531:Eggs / Q000032:analysis*; D008460:Meat / Q000032:analysis*; D008892:Milk / Q000737:chemistry*; D013552:Swine
chemical_list: D000871:Anthelmintics; D001562:Benzimidazoles; C031000:benzimidazole