title: [Determination of captafol, cyhexatin, 1-naphthylacetic acid and quintozene in apple, Japanese pear and melon by simultaneous extraction].
abstract: A simple and rapid method is described for the determination of the non-registered pesticides, captafol, quintozene (PCNB), cyhexatin and 1-naphthylacetic acid (NAA), in fruits. These pesticides were extracted with acidified acetone, then captafol and PCNB were purified with a Florisil mini column and analyzed by GC-ECD. Cyhexatin was ethylated with ethylmagnesium bromide, and the ethyl derivative was analyzed by GC-FPD (Sn filter). NAA was purified with liquid-liquid extraction and determined by HPLC equipped with a fluorescence detector. These analytes were identified with GC/MS or LC/MS. The minimum identified concentration of the pesticides was below 0.2 ng per injection, which corresponds to a detection limit of below 0.02 microgram/g in the original samples. Recoveries of the pesticides spiked at 0.1 microgram/g into apple, Japanese pear and melon were greater than 61%.
authors.affiliation: Tokyo Metropolitan Research Laboratory of Public Health: 3-24-1, Hyakunin-cho, Shinjuku-ku, Tokyo 169-0073, Japan.
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Nagayama
authors.forename: Ichiro
authors.initials: I
authors.lastname: Takano
authors.forename: Maki
authors.initials: M
authors.lastname: Kobayashi
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Tamura
authors.forename: Sanae
authors.initials: S
authors.lastname: Tomizawa
authors.forename: Yukinari
authors.initials: Y
authors.lastname: Tateishi
authors.forename: Naoko
authors.initials: N
authors.lastname: Kimura
authors.forename: Kyoko
authors.initials: K
authors.lastname: Kitayama
authors.forename: Kazuo
authors.initials: K
authors.lastname: Saito
mesh_terms: D002215:Captan / Q000031:analogs & derivatives* / Q000032:analysis*; D028462:Cucumis / Q000737:chemistry*; D053138:Cyclohexenes; D005659:Fungicides, Industrial / Q000032:analysis*; D007306:Insecticides / Q000032:analysis*; D027845:Malus / Q000737:chemistry*; D009280:Naphthaleneacetic Acids / Q000032:analysis*; D009578:Nitrobenzenes / Q000032:analysis*; D031989:Pyrus / Q000737:chemistry*; D014220:Trialkyltin Compounds / Q000032:analysis*
chemical_list: D053138:Cyclohexenes; D005659:Fungicides, Industrial; D007306:Insecticides; D009280:Naphthaleneacetic Acids; D009578:Nitrobenzenes; D014220:Trialkyltin Compounds; C034182:1-naphthaleneacetic acid; C001765:cyhexatin; C001614:captafol; D002215:Captan; C005805:quintozene