Application of time-resolved fluorometry to the resolution of porphyrin-photoproduct mixtures. Academic Article uri icon


  • AbstractThe quantitation of porphyrin and its photoproducts in biological samples is important in diverse applications including, but not limited to, tumor phototherapy. Differences in fluorescence properties, e.g., emission spectra and lifetimes, of the various components can be utilized to resolve the individual contributions. In this report timeresolved measurements using multifrequency phase and modulation rluorometry are employed to study mixtures of protoporphyrin IX and photoprotoporphyrin. Individual lifetimes of 14.85 ns and 5.95 ns were determined for dioxane solutions of protoporphyrin IX and photoprotoporphyrin, respectively. These lifetime values were utilized to resolve the individual emission spectrum of each component in the mixture using the phaseresolved Huorometry technique. Copyright 1988, Wiley Blackwell. All rights reserved

published proceedings

  • Photochem Photobiol

author list (cited authors)

  • Valat, P., Reinhart, G. D., & Jameson, D. M.

citation count

  • 14

complete list of authors

  • Valat, P||Reinhart, GD||Jameson, DM

publication date

  • June 1988