Isotope selective element analysis by diode laser atomic absorption spectrometry |
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| Authors: | H. D. Wizemann K. Niemax |
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| Affiliation: | (1) Institute of Physics, University of Hohenheim, Garbenstrasse 30, D-70599 Stuttgart, Federal Republic of Germany;(2) Institute of Spectrochemistry and Applied Spectroscopy (ISAS), Bunsen-Kirchhoff-Strasse 11, D-44139 Dortmund, Federal Republic of Germany |
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| Abstract: | The analytical figures of merit of isotope selective diode laser atomic absorption spectrometry (DLAAS) in low-pressure graphite furnaces are given for lithium and rubidium. While6Li and7Li were measured by Doppler-limited as well as by Doppler-free absorption spectroscopy of the 670.79 nm resonance line, Doppler-free saturation spectroscopy was applied for analysis of the85Rb and87Rb D2 resonance line at 780.03 nm. Three different modulation techniques were applied and compared: (i) intensity modulation, (ii) wavelength modulation, and (iii) a combination of intensity and wavelength modulation. |
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| Keywords: | atomic absorption spectrometry diode laser spectrometry isotope analysis isotope dilution |
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