Photocatalytic degradation-excitation-emission matrix fluorescence for increasing the selectivity of polycyclic aromatic hydrocarbon analyses

Yoon-Chang Kim; James A Jordan; Michelle L Nahorniak; Karl S Booksh

doi:10.1021/ac0509051

Photocatalytic degradation-excitation-emission matrix fluorescence for increasing the selectivity of polycyclic aromatic hydrocarbon analyses

Anal Chem. 2005 Dec 1;77(23):7679-86. doi: 10.1021/ac0509051.

Authors

Yoon-Chang Kim¹, James A Jordan, Michelle L Nahorniak, Karl S Booksh

Affiliation

¹ Department of Chemistry and Biochemistry, Arizona State University, Tempe, 85287-1604, USA.

PMID: 16316176
DOI: 10.1021/ac0509051

Abstract

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.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Catalysis
Photochemistry
Polycyclic Aromatic Hydrocarbons / analysis*
Polycyclic Aromatic Hydrocarbons / chemistry*
Spectrometry, Fluorescence / instrumentation*
Spectrometry, Fluorescence / methods*

Substances

Polycyclic Aromatic Hydrocarbons