title: [Simultaneous determination of N-methylcarbamate and urea pesticides in agricultural products by LC/MS].
abstract: A simultaneous determination method of 7 N-methylcarbamate and 7 urea pesticides in agricultural products by liquid chromatography/mass spectrometry (LC/MS) has been developed. Under reversed-phase liquid chromatographic conditions, 14 pesticides were analyzed using electrospray ionization (ESI) with simultaneous acquisition of positive ions and negative ions. Fourteen pesticides were extracted with acetone, 10% NaCl solution was added, and the pesticides were re-extracted with dichloromethane. The extract was concentrated under reduced pressure, and dissolved in methanol. The detection limits of 14 pesticides ranged from 0.0012 to 0.0056 microgram/g. The recoveries of pesticides were from 36.5 to 112.5% [RSD (n = 3) ranged from 0.5 to 48.1%] for 4 agricultural products.
authors.affiliation: Kitakyushu City Institute of Environmental Sciences: 1-2-1, Shinike, Tobata-ku, Kitakyushu, Fukuoka 804-0082, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Higuchi
authors.forename: Yoshifumi
authors.initials: Y
authors.lastname: Hanada
authors.forename: Seiichi
authors.initials: S
authors.lastname: Ishikawa
authors.forename: Eiichi
authors.initials: E
authors.lastname: Ueda
authors.forename: Masanori
authors.initials: M
authors.lastname: Takahashi
mesh_terms: D002219:Carbamates / Q000032:analysis*; D002853:Chromatography, Liquid / Q000379:methods*; D018556:Crops, Agricultural / Q000737:chemistry*; D005506:Food Contamination / Q000032:analysis; D013058:Mass Spectrometry / Q000379:methods*; D010573:Pesticide Residues / Q000032:analysis*; D014508:Urea / Q000032:analysis*
chemical_list: D002219:Carbamates; D010573:Pesticide Residues; C020401:N-methylcarbamate; D014508:Urea