Analytical application of 2f-wavelength modulation for isotope selective diode laser graphite furnace atomic absorption spectroscopy

Authors
Citation
Hd. Wizemann, Analytical application of 2f-wavelength modulation for isotope selective diode laser graphite furnace atomic absorption spectroscopy, FRESEN J AN, 366(2), 2000, pp. 152-155
Citations number
16
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY
ISSN journal
09370633 → ACNP
Volume
366
Issue
2
Year of publication
2000
Pages
152 - 155
Database
ISI
SICI code
0937-0633(200001)366:2<152:AAO2MF>2.0.ZU;2-6
Abstract
Experiences in the analytical application of the 2f-wavelength modulation t echnique for isotope selective atomic absorption spectroscopy in a graphite furnace are reported. Experimental as well as calculated results are prese nted, mainly for the natural lithium isotopes. Sensitivity, linearity, and (isotope) selectivity are studied by intensity modulation and wavelength mo dulation. High selectivities can be attained, however, on the cost of detec tion power. It is shown that the method enables the measurement of lithium isotope ratios larger than 2000 by absorption in a low-pressure graphite tu be atomizer.