Evolving Factor Analysis for Frequency-Domain Lifetime Resolution of Fluorescence Spectra

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Abstract:

Evolving factor analysis (EFA) is a new approach to the resolution of individual component spectra on the basis of fluorescence lifetime differences. Phase-resolved fluorescence spectra collected at several excitation modulation frequencies are well suited to EFA resolution because the frequency-response curve of phase-resolved intensity for each lifetime component has a single, unique maximum. Unlike other self-modeling spectral matrix resolution methods, EFA has no fundamental limitation upon the number of components that can be resolved. In this work, the resolution of two-component and three-component mixtures of polycyclic aromatic hydrocarbons is demonstrated.

Keywords: Chemometrics; Computer applications; Fluorescence; Luminescence; Spectroscopic techniques; Time-resolved spectroscopy; UV-visible spectroscopy

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702924444290

Affiliations: 1: Department of Chemistry, P. M. Gross Chemical Laboratory, Duke University, Durham, North Carolina 27706; current address: E. I. DuPont, Jackson Laboratory, Chambers Works, Deepwater, NJ 08023 2: Department of Chemistry, P. M. Gross Chemical Laboratory, Duke University, Durham, North Carolina 27706

Publication date: January 1, 1992

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