A Selective Spectral-Line Modulation Technique for High Sensitivity Continuum Source Atomic Absorption Spectrometry.
Abstract
A selective spectral-line modulation technique for performing continuum-source atomic absorption is described and its operation discussed. In the new technique, discrete droplets of a metal salt standard solution are periodically introduced into a source modulator flame. The atom clouds produced within this flame move through the radiation path of a continuum source, thereby selectively modulating only those atomic lines characteristic of the atoms within the cloud. This combination of continuum source and source modulator flame replaces a modulated line source within an otherwise typical atomic absorption spectrometer. The system is shown to enable multi-element analysis and exhibits relative freedom from both line and broad-band spectral interferences. Analytical curves and sensitivities obtained with the system for several elements are presented. Extensions of the system and its applications are briefly discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 25, 1976
- Accession Number
- ADA029653
Entities
People
- Gary M. Hieftje
- Ronald L. Cochran
Organizations
- Indiana University Bloomington