Although continuum sources in atomic fluorescence spectrometry have been thought to be of little use for studies below 200 nm, a high pressure xenon are continuum source has proved to be effective for exciting arsenic at 189.0, 193.7, and 197.2 nm. To enable good atomization characteristics
and a constant signal for wavelength scans, a commercially prepared mixture of arsine in H2 was used as the sample. A wavelength scan is presented, comparisons of sensitivities at various wavelengths are shown, and some indication of the quenching characteristics of Ar and N2
are included in this work. Analytical studies show that the 189.0 nm line has the greatest sensitivity and when this line is used in conjunction with the 235.0 nm line, a dynamic range of approximately 700 is expected. The detection limit in terms of mass flow of As, is found to be about 0.5
ng/s at the 189.0 nm line.
Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
Publication date: March 1, 1978
More about this publication?
The Society publishes the internationally recognized, peer reviewed journal, Applied Spectroscopy, which is available both in print and online. Subscriptions are included with membership or can be purchased by institutional or corporate organizations. Abstracts may be viewed free of charge. Previously published as Bulletin (Society for Applied Spectroscopy)