Abstract

Cationic interactions in flame photometry were investigated to study some of the factors that cause enhancements of spectral lines. Interactions of the alkali and alkaline earth metals in an oxygen-acetylene flame have indicated that several mechanisms may be responsible for enhancement. Where conditions are proper, enhancements of emissions of cations may be a combination of at least three factors. a) the effect of electron concentration from an easily ionized extraneous element on the ground state population of the test element, b) the effect of transfer of energy by radiation and c) the effect of transfer of energy due to collisions with excited atoms The effect of the electron concentration on the suppression of the ionization of the test element was the predominant mechanism by which enhancement occurred in most systems studied. However, in the study of the effect of potassium on rubidium direct evidence was obtained of excitation by transfer of radiant energy Indirect evidence of enhancement due to transfer of energy by collision also was observed in the same system.

The Effect of Alkali and Alkaline Earth Salts on the Spectrographic Determination of Strontium*

E. Fast and J. Rud Nielsen
J. Opt. Soc. Am. 37(8) 614-622 (1947)

Atomic Absorption Spectroscopy with High Temperature Flames

J. B. Willis
Appl. Opt. 7(7) 1295-1304 (1968)

Effect of Alkali and Alkaline Earth Chlorides on the Anode Temperature of the dc Arc*

Bert L. Vallee and Ralph E. Thiers
J. Opt. Soc. Am. 46(2) 83-86 (1956)

High-resolution Rydberg-state spectroscopy of stable alkaline-earth elements

R. Beigang
J. Opt. Soc. Am. B 5(12) 2423-2436 (1988)

Optical Cross Section of Resonance Lines Emitted by Flames under Conditions of Partial Thermal Ionization*†

Fritz W. Hofmann and Hedwig Kohn
J. Opt. Soc. Am. 51(5) 512-521 (1961)