title: Pesticide analysis by MEKC on a microchip with hydrodynamic injection from organic extract.
abstract: An integrated microchip for monitoring carbamate pesticides in environmental water using continuous flow chemical processes is under development, i. e., the integration of hydrolysis, azo-derivatization, liquid-liquid extraction, electrophoretic separation, and quantification. The separation of the derivatives of four carbamate pesticides (carbaryl, carbofuran, propoxur, and bendiocarb) extracted in the continuous flow of a 1-butanol phase was studied in a silica microchip using micellar EKC. A baseline separation of four pesticide derivatives was achieved on a silica chip using hydrodynamic injection with electroosmotic gating. Detection using a thermal lens microscope showed good linearity in the concentration range of 10(-6 )-10(-5 )M with an LOD of 5 x 10(-7) M, which is superior to that of conventional CE with UV absorption detection at a level of 10(-4) M.
authors.affiliation: Japan Science and Technology Agency (JST), Kawaguchi, Saitama, Japan.
authors.forename: Adelina
authors.initials: A
authors.lastname: Smirnova
authors.forename: Kiyohito
authors.initials: K
authors.lastname: Shimura
authors.forename: Akihide
authors.initials: A
authors.lastname: Hibara
authors.forename: Mikhail A
authors.initials: MA
authors.lastname: Proskurnin
authors.forename: Takehiko
authors.initials: T
authors.lastname: Kitamori
mesh_terms: D002219:Carbamates / Q000737:chemistry; D020374:Chromatography, Micellar Electrokinetic Capillary / Q000379:methods*; D046209:Electrophoresis, Microchip / Q000379:methods*; D010575:Pesticides / Q000032:analysis / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D002219:Carbamates; D010575:Pesticides; D014874:Water Pollutants, Chemical