Simultaneous fluorescence, photoacoustic and two-photon photoionization detection for liquids in a cuvette.
A simple, sensitive liquid-phase photoionization detection scheme employing pulsed laser excitation has been developed. The system is an elaboration of an earlier simultaneous fluorescence and photoacoustic detection scheme employing a standard fluorescence cuvette. Factors affecting the analytical performance of the two-photon photoionization mode of operation are discussed, sensitive three-mode detection is demonstrated for a model compound (anthracene), and the effect of temperature on the photoionization mode provides an estimate of the ionic-charge carrier activation-energy in the conductance transport process.
Voigtman
E
E
Department of Chemistry, University of Florida, Gainesville, FL 32611, U.S.A.
Winefordner
J D
JD