Accession Number:

ADA066083

Title:

Comparison of Atomic Fluorescence Power Efficiencies for the Helium-Oxygen-Acetylene and Air-Acetylene Flames.

Descriptive Note:

Interim technical rept.,

Corporate Author:

INDIANA UNIV AT BLOOMINGTON DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1979-03-05

Pagination or Media Count:

41.0

Abstract:

Power efficiencies for five elements have been measured for the helium-oxygen-acetylene and air-acetylene flames. The increased power efficienceis found in this study for the helium-diluted flame, coupled with its enhanced atom formation capabilities, suggest that greater atomic fluorescence sensitivity should exist. However, in a comparison study with an air-acetylene flame using identical experimental conditions, a decreased atomic fluorescence signal-to-noise ratio was found for most elements in the helium-diluted flame. This decrease has been ascribed to greater background emission noise in the higher-temperature helium-diluted flame and decreased nebulization efficiency caused by the low density of the helium-containing nebulizer gas. A comparison of flame emission detection limits for the two flames indicates the increased sensitivity of the higher-temperature helium-acetylene flame, despite its lower nebulization efficiency. Author

Subject Categories:

  • Inorganic Chemistry
  • Organic Chemistry
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE