Does asymmetric charge transfer play an important role as an ionization mode in low power–low pressure glow discharge mass spectrometry?

What is it about?

Glow discharge mass spectrometry and optical emission spectroscopy used to study the role of asymmetric charge transfer in 'low power' GD as in the Astrum GD-MS.

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Why is it important?

Asymmetric charge transfer process is a very important mechanism for the production of ground and, more usually, excited ions of the elements analysed in analytical glow discharges such as Grimm-type and fast-flow sources running in low-pressure noble gases (~15–40 W, ~5 hPa). In this paper using both GD-MS and GD-OES, we have shown that it still important if power reduced (~1 kV and ~3 mA).