Saturation of Energy Levels in Analytical Atomic Fluorescence Spectrometry. II. Experimental.
Abstract
A theoretical Model was proposed to describe the saturation of atomic energy levels under conditions of intense but brief irradiation by a suitable excitation source. The experimental verification of that model is presented herein. In this study, the effects on dye laser-induced saturation of analyte concentration, flame composition and atomic properties of the elements were all examined and quantitated in terms of a measurable parameter, the saturation spectral power density (SSPD). The results of those studies reveal that SSPD is relatively independent of analyte concentration and flame composition but is a strong function of the nature of each particular atomic transition employed. Moreover, because of strong quenching in most analytical flames, a simple steady-state model for saturation applies even for breif, 5.6 ns. pulses from a nitrogen-laser pumped dye laser. Most importantly, it is shown that reliable values for the SSPD can be obtained only through careful experimental design; considerations important in such measurements are therefore carefully detailed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 30, 1981
- Accession Number
- ADA094469
Entities
People
- Dorys Rojas De Olivares
- Gary M. Hieftje
Organizations
- Indiana University