Accession Number:

ADA029653

Title:

A Selective Spectral-Line Modulation Technique for High Sensitivity Continuum Source Atomic Absorption Spectrometry.

Descriptive Note:

Interim technical rept.,

Corporate Author:

INDIANA UNIV BLOOMINGTON DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1976-08-25

Pagination or Media Count:

44.0

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

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE