Four-way modeling of 4.2 K time-resolved excitation emission fluorescence data for the quantitation of polycyclic aromatic hydrocarbons in soil samples

    Authors

    H. C. Goicoechea; S. J. Yu; A. F. T. Moore;A. D. Campiglia

    Comments

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    Abbreviated Journal Title

    Talanta

    Keywords

    Third-order multivariate calibration; Shpol'skii spectroscopy; PARAFAC; U-PLS/RTL; Time-resolved excitation-emission cubes (TREECs); Soils; Polycyclic aromatic hydrocarbons (PAHs); MULTIVARIATE CURVE RESOLUTION; PARALLEL FACTOR-ANALYSIS; 15 PRIORITY; POLLUTANTS; PAH-CONTAMINATED SOIL; PARTIAL LEAST-SQUARES; SHPOLSKII; SPECTROMETRY; 2ND-ORDER ADVANTAGE; MATRIX FLUORESCENCE; WATER SAMPLES; ENVIRONMENTAL-ANALYSIS; Chemistry, Analytical

    Abstract

    A screening method for the soil analysis of 15 Environmental Protection Agency-polycyclic aromatic hydrocarbons (EPA-PAHs) is reported. The new method is based on the collection of 4.2 K fluorescence time-resolved excitation-emission cubes (TREECs) via laser-excited time-resolved Shpol'skii spectroscopy. 4.2 K fluorescence TREECs result from the superposition of fluorescence time-resolved excitation emission matrices recorded at different time windows from the laser excitation pulse. Potential interference from unknown sample concomitants is handled by processing the four-way 4.2 K fluorescence TREEC data arrays with either parallel factor analysis (PARAFAC) or unfolded partial least-squares/residual-trilinearization(U-PLS/RTL). The sensitivity of the two approaches makes possible to determine PAHs at the ng g(-1) to pg g(-1) concentration level with no need for sample preconcentration. Its selectivity eliminates sample clean-up steps and chromatographic separation. These features reduce PAH loss, analysis time and cost. The method is environmentally friendly as the complete screening of the 15 EPA-PAHs takes only 250 mu L of organic solvent per sample. (C) 2012 Elsevier B.V. All rights reserved.

    Journal Title

    Talanta

    Volume

    101

    Publication Date

    1-1-2012

    Document Type

    Article

    Language

    English

    First Page

    330

    Last Page

    336

    WOS Identifier

    WOS:000313084400048

    ISSN

    0039-9140

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