Detection limits of metal species extended by OGE


  • Anonymous


Scientists at the National Bureau of Standards (NBS) recently reported on the opto-galvanic effect (OGE) which can be monitored electrically to eliminate problems associated with laser scatter in analytical spectrometry and spectroscopic applications. These studies of interference effects have also expanded the limits of detection of some metal species.

Peter K. Schenck, John C. Travis, Kermit C. Smyth, and David S. King of NBS described their experiments with discharges involving both continuous wave and pulsed dye lasers to irradiate hollow cathode lamps usually used for spectroscopic frequency calibration and atomic absorption analysis. Since the lamps are convenient atomic reservoirs, changes induced in the conductivity of their discharges may readily be observed.