The following is an abstract for the selected article. A PDF download of the full text of this article is available here. Members may download full texts at no charge. Non-members may be charged a small fee for certain articles.
Comparative Study of Photovoltaic and Photoconductive Detection Methods for Liquid-Phase Photoionization
Volume 48, Number 9 (Sept. 1994) Page 1102-1110
Judge, John W.; McGuffin, Victoria L.
The photovoltaic method for the detection of liquid-phase photoionization in the absence of an applied electric field is compared to the traditional photoconductive method. Each system is characterized by means of signal and signal-to-noise ratio measurements with respect to laser pulse energy, applied voltage, electrode separation distance, solute concentration, and solvent composition. Although both techniques exhibit similar detection limits (1 × 10-7 M) for solutes in polar solvents such as methanol and water, the photovoltaic technique has a more extensive linear dynamic range (103). Moreover, this technique allows detection of solutes in ionic solutions with comparable detectability and linearity.