Comparison of Atomic Fluorescence Power Efficiencies for the Helium-Oxygen-Acetylene and Air-Acetylene Flames.
Interim technical rept.,
INDIANA UNIV AT BLOOMINGTON DEPT OF CHEMISTRY
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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
- Inorganic Chemistry
- Organic Chemistry
- Atomic and Molecular Physics and Spectroscopy