Title

Four-Way Modeling Of 4.2 K Time-Resolved Excitation Emission Fluorescence Data For The Quantitation Of Polycyclic Aromatic Hydrocarbons In Soil Samples

Keywords

PARAFAC; Polycyclic aromatic hydrocarbons (PAHs); Shpol'skii spectroscopy; Soils; Third-order multivariate calibration; Time-resolved excitation-emission cubes (TREECs); U-PLS/RTL

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 pre-concentration. 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 μL of organic solvent per sample. © 2012 Elsevier B.V. All rights reserved.

Publication Date

11-15-2012

Publication Title

Talanta

Volume

101

Number of Pages

330-336

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.talanta.2012.09.035

Socpus ID

84869880802 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84869880802

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