The use of discharge lamps as directly modulated atom reservoirs for selective line modulation in atomic emission spectrometry |
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Authors: | J.C. Mitchell A.W. Steele G.M. Hieftje |
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Affiliation: | Department of Chemistry, Indiana University, Bloomington, IN 47405 U.S.A. |
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Abstract: | A simple method is described for selectively modulating the atomic or ionic resonance lines emitted by an excitation source. A modified discharge lamp with a cylindrical hollow cathode is used to generate a modulated atom cloud. The emission from the excitation source is then imaged through the modulated atom cloud within the cylindrical cathode lamp, to yield a selectively modulated signal. The ability of the system to reduce spectral interferences in inductively-coupled plasma emission spectrometry is assessed and discussed. |
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