Analytical Chemistry · 2005 · 33 citations · 10 references
Natural SciencesChemistryEnvironmental SciencesAnalytical ChemistryEnvironmental ChemistrySpectroscopic AnalysisEnvironmental AnalysisEnvironmental Analytical ChemistryFluorescence SpectroscopyPhotocatalysisPhotochemistrySpectral Data ProcessingAnalytical Detection Of Organic PollutantsAromatic HydrocarbonsData CubesOrganic Pollutant DegradationPhotocatalytic DegradationPolycyclic Aromatic Hydrocarbon AnalysisPolycyclic Aromatic HydrocarbonsSelectivity
The application of photocatalysis enhancement to calibration of fluorescence excitation-emission matrixes (EEMs) with parallel factor (PARAFAC) analysis is described. In this study, three- and four-way PARAFAC analysis was employed to extract the fluorescent species' spectra from overlapping EEMs. Time-dependent photocatalysis degradation of the polycyclic aromatic hydrocarbons (PAHs) was employed to create an additional dimension for analysis. The consequent four-dimension degradation-EEM data cubes have greater selectivity for each PAH than do three-dimension EEM data cubes alone. On a scale of 0 to 1, with 0 being completely collinear spectra and 1 being orthogonal spectra, including the time-dependent measurements increased the selectivity an average of 21%, from 0.73 to 0.87.
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