title: Homogeneous liquid-liquid extraction and micellar electrokinetic chromatography using sweeping effect concentration system for determination of trace amounts of several polycyclic aromatic hydrocarbons.
abstract: A powerful capillary electrophoresis (CE) method, with preconcentration in excess of 100,000-fold, has been developed by using a specific characteristic of perfluoro surfactants. Highly sensitive determination and separation of polycyclic aromatic hydrocarbons (PAH) were achieved by following a combination of two kinds of efficient preconcentration method using perfluoro surfactants. The two preconcentration methods combined were homogeneous liquid-liquid extraction for off-line concentration and a sweeping method as on-line concentration. Five PAH (1,2,3,4-dibenzanthracene, 1,2,5,6-dibenzanthracene, benzo( a)pyrene, benzo( e)pyrene, and pyrene) were investigated, and were completely separated. When the concentration-factor (volume ratio) was 8335-fold, the determination limits were in the range 10(-10) to 10(-9) mol L(-1). The maximum concentration-factor (volume ratio) obtained was 125,000-fold. Addition and recovery experiments were performed for three kinds of natural water (rain water, river water, and spring water).
authors.affiliation: Department of Materials Science, Faculty of Engineering, Ibaraki University, 4-12-1 Nakanarusawa, Hitachi, Ibaraki 316-8511, Japan.
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Takagai
authors.forename: Shukuro
authors.initials: S
authors.lastname: Igarashi
mesh_terms: D002138:Calibration; D002845:Chromatography / Q000379:methods; D008823:Micelles; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D011891:Rain; D012680:Sensitivity and Specificity; D014867:Water / Q000032:analysis
chemical_list: D008823:Micelles; D011084:Polycyclic Aromatic Hydrocarbons; D014867:Water