Direct determination of dibenzo a.l pyrene and its four dibenzopyrene isomers in water samples by solid-liquid extraction and laser-excited time-resolved Shpol'skii spectrometry

    Authors

    S. J. Yu;A. D. Campiglia

    Comments

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    Abbreviated Journal Title

    Anal. Chem.

    Keywords

    POLYCYCLIC AROMATIC-HYDROCARBONS; MULTIDIMENSIONAL FLUORESCENCE; SPECTROSCOPY; ROOM-TEMPERATURE PHOSPHORIMETRY; ENVIRONMENTAL-SAMPLES; FIBEROPTIC PROBE; HPLC FRACTIONS; DIBENZO, L>PYRENE; MATRICES; Chemistry, Analytical

    Abstract

    Dibenzo[a,l]pyrene is considered the most potent carcinogen of all polycyclic aromatic hydrocarbons ever tested. Its four isomers, which include dibenzo[a,e]pyrene, dibenzo[a,h]pyrene, dibenzo[a,i]pyrene, and dibenzo[e,l]pyrene, are also carcinogenic and, therefore, a potential threat to humans. The method presented here provides a direct way for their determination in water samples. The entire procedure-from water extraction to LETRSS analysis-takes less than 15 min/sample and it consumes only 100 muL of organic solvent. This fact makes our approach environmentally friendly and cost-effective. Unambiguous isomer determination is accomplished via multidimensional data formats, namely, wavelength time matrixes, excitation-emission matrixes, and time-resolved excitation-emission matrixes. The analytical figures of merit demonstrate precise and accurate analysis at the sub-parts-per-billion level. limits of detection are at the parts-per-trillion level. The potential of this approach for real-world analysis is illustrated with a heavily contaminated water samples.

    Journal Title

    Analytical Chemistry

    Volume

    77

    Issue/Number

    5

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    1440

    Last Page

    1447

    WOS Identifier

    WOS:000227409800040

    ISSN

    0003-2700

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