title: Rapid screening of polycyclic aromatic hydrocarbons (PAHs) in waters by directly suspended droplet microextraction-microvolume fluorospectrometry.
abstract: A rapid and simple screening method for polycyclic aromatic hydrocarbons (PAHs) in water samples is proposed. The method is based on the combination of a miniaturized sample preparation approach, namely, directly suspended droplet microextraction (DSDME), and microvolume fluorospectrometry. Benzo[a]pyrene (BaP) was used as the model compound for screening purposes. Under optimal conditions, a detection limit of 0.024 μg L(-1) and an enrichment factor of 159 were obtained for BaP in 5 min. The repeatability, expressed as relative standard deviation (RSD), was 4.9% (n=8). The unreliability region of the screening method was 0.54-0.67 μg L(-1), by using a cut-off value of 0.6 μg L(-1) of BaP. Finally, the proposed method was applied to the in situ achievement of the binary "yes/no" response for PAHs in different water samples and recovery studies were performed at three different levels, with BaP recoveries in the range of 93-104%.
authors.affiliation: Departamento de Química Analítica y Alimentaria, Área de Química Analítica, Facultad de Química, Universidad de Vigo, Campus As Lagoas-Marcosende s/n, 36310 Vigo, Spain.
authors.forename: Francisco
authors.initials: F
authors.lastname: Pena-Pereira
authors.forename: Isabel
authors.initials: I
authors.lastname: Costas-Mora
authors.forename: Isela
authors.initials: I
authors.lastname: Lavilla
authors.forename: Carlos
authors.initials: C
authors.lastname: Bendicho
mesh_terms: D001564:Benzo(a)pyrene / Q000032:analysis*; D057230:Limit of Detection; D059627:Liquid Phase Microextraction / Q000379:methods*; D015203:Reproducibility of Results; D012997:Solvents; D013050:Spectrometry, Fluorescence / Q000379:methods*; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D012997:Solvents; D014874:Water Pollutants, Chemical; D014867:Water; D001564:Benzo(a)pyrene