Issue 9, 2000

Abstract

A high voltage, microsecond regime, pulsed glow discharge has been applied to a standard Grimm type source on a LECO SA-2000 multichannel optical spectrometer. The spectrometer system has been equipped with fast time-resolved electronics in order to study the temporal response of the elemental emission lines. The aim of the research was to investigate possible gains in signal-to-background ratio (S/B) and detection limits compared to a conventional direct current (dc) mode of operation. It was found that the high instantaneous pulse power in itself gives approximately a factor 2 increase in S/B. By utilising time-resolved detection, gains in the range 5–10 are achieved. For nitrogen, it was found that the background from leakage of air could be reduced to approximately 1/3 compared with the dc mode. Another interesting observation was that certain nearly non-conducting materials, which cannot be run in dc mode, could be run in the microsecond pulsed mode.

Article information

Article type
Paper
Submitted
20 Apr 2000
Accepted
28 Jul 2000
First published
17 Aug 2000

J. Anal. At. Spectrom., 2000,15, 1279-1284

Microsecond pulsed glow discharge optical emission spectrometry — investigation of temporal emission characteristics

A. Bengtson, C. Yang and W. W. Harrison, J. Anal. At. Spectrom., 2000, 15, 1279 DOI: 10.1039/B003204M

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