Issue 6, 2003
From the journal:

Journal of Analytical Atomic Spectrometry

Influence of hydrogen on the analytical figures of merit of glow discharge optical emission spectroscopy—friend or foe?†

Vasile-Dan Hodoroaba,*a   Edward B. M. Steers,b   Volker Hoffmann,c   Wolfgang E. S. Unger,a   Wolfgang Paatscha  and  Klaus Wetzigc  

* Corresponding authors

a Bundesanstalt für Materialforschung und –prüfung (BAM), D-12200 Berlin, Germany
E-mail: Dan.Hodoroaba@bam.de

b London Metropolitan University, Holloway Road, London, UK

c Leibniz Institute for Solid State and Materials Research Dresden, PF 27 01 16, D-01171 Dresden, Germany

Abstract

It is well known that the presence of small quantities of hydrogen in an argon glow discharge (GD) causes serious alterations to the excitation and ionisation mechanisms in the GD plasma and hence to the analytical signals. This so-called “hydrogen effect” leads also to a change in the shape of the sputtering crater and its roughness. The present work shows how the manifold effects of hydrogen can be exploited in glow discharge optical emission spectroscopy (GD-OES) in order to improve analytical figures of merit such as analytical sensitivity, detection limits and depth resolution. Other problems caused by the presence of hydrogen, e.g. the occurrence of hydride bands, are demonstrated and discussed. It is shown that start-up phenomena leading to a falsification of the initial part of GD-OES depth profiles can be partially inhibited by controlling the GD source cleanness, and possibly by adding hydrogen.

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Article information

DOI
https://doi.org/10.1039/B301326J
Article type
Paper
Submitted
03 Feb 2003
Accepted
25 Mar 2003
First published
30 Apr 2003

J. Anal. At. Spectrom., 2003,18, 521-526

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Influence of hydrogen on the analytical figures of merit of glow discharge optical emission spectroscopy—friend or foe?

V. Hodoroaba, E. B. M. Steers, V. Hoffmann, W. E. S. Unger, W. Paatsch and K. Wetzig, J. Anal. At. Spectrom., 2003, 18, 521 DOI: 10.1039/B301326J

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