Photothermal detection of trace optical absorption in water using visible light emitting diodes

Abstract

Visible light emitting diodes of three different colors have been used to detect an absorbing compound (potassium permanganate) in trace quantities in aqueous solution. Photothermal absorption in a closed cell caused deflection of a water meniscus held at a small pinhole. The displacement was monitored using optical fiber interferometry. The technique was… (More)

Topics

10 Figures and Tables

Cite this paper

@inproceedings{Hodgkinson2010PhotothermalDO, title={Photothermal detection of trace optical absorption in water using visible light emitting diodes}, author={Jane Hodgkinson and Mark R. Johnson and John Dakin}, year={2010} }