Glow discharge mass spectrometry: a current assessment

Abstract

Glow discharge mass spectrometry has reached a general stage of acceptance in numerous analytical laboratories. It has proved to be fairly sensitive for direct solids elemental analysis, exhibits a broad dynamic range and is relatively free from matrix effects. As a result, it is rapidly replacing other methods for the analysis of solids. However, serious problems may result from spectral interferences if the analyst is not alert to such possibilities. These interferences can be minimised or removed by any one of several approaches, depending upon the type and extent of the problem. In this overview of glow discharge mass spectrometry, the original hopes and expectations of the technique are compared with its current level of maturity and the available projections for its possible future role in trace element analysis.