title: [Determination of hymexazol in agricultural products by GC-NPD].
abstract: A method for the determination of hymexazol in agricultural produdcts by gas chromatography with a highly sensitive nitrogen-phosphorus detector (GC-NPD) was investigated. Hymexazol was extracted with acetonitrile, and the acetonitrile layer was separated by salting-out. The water layer was loaded onto a Chem-Elut column. Hymexazol in the water layer was adsorbed on the column, and eluted with ethyl acetate. The acetonitrile layer and the eluate were mixed and evaporated. The residue was dissolved in ethyl acetate, and the sample solution was cleaned up on a C18 column. Hymexazol in the eluate was analyzed by GC-NPD with a high-polarity capillary column (DB-FFAP) and highly deactivated inlet liner. Recoveries of hymexazol spiked in agricultural products (tomato, lemon, soybean and other samples) at the level of 0.1 mug/g ranged from 65.0 to 84.7%. The limit of detection was 0.02microg/g.
authors.affiliation: Tokyo Metropolitan Institute of Public Health, Tokyo, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Tamura
authors.forename: Ichiro
authors.initials: I
authors.lastname: Takano
authors.forename: Maki
authors.initials: M
authors.lastname: Kobayashi
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: Sakai
authors.forename: Kyoko
authors.initials: K
authors.lastname: Kamijo
authors.forename: Akihiro
authors.initials: A
authors.lastname: Ibe
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Nagayama
mesh_terms: D016573:Agrochemicals / Q000032:analysis*; D002849:Chromatography, Gas / Q000295:instrumentation*; D018556:Crops, Agricultural / Q000737:chemistry*; D010080:Oxazoles / Q000032:analysis*
chemical_list: D016573:Agrochemicals; D010080:Oxazoles; C531211:hymexazol