Consideration of the chemical reactivity of trace impurities present in a glow discharge

Detection of trace radioisotopes in soil, sediment and vegetation by glow discharge mass spectrometry

“…The glow discharge was supported by high-purity argon that was additionally purified by an inline heated (400°C), active-metal getter system. In addition, the discharge cell was cryo-cooled with liquid nitrogen to about -130°C to reduce the background due to residual gases [9,10].…”

Simultaneous multielement detection in particle beam/hollow cathode-optical emission spectroscopy

“…no residual solvent gets into the glow discharge). Residual vapors reaching the glow discharge compete for the fixed amount of plasma energy, effectively quenching the plasma [23][24][25], while also contributing elemental and molecular spectral backgrounds. The nebulization of the solvent and analyte into a fine aerosol spray is the first of a two-part process required to produce dry analyte particles; the second being the desolvation step.…”

Plasma diagnostics and numerical simulations: insight into the heart of analytical glow discharges

“…67 Mass spectra taken with water concentrations up to 5% reveal that the primary glow discharge species arise from ion-molecule reactions and water dissociation in the plasma. Similarly, Ohorodnik et al 68 applied optical and mass spectrometric diagnostics for studying the chemical reactivity of the plasma impurity species in an rf glow discharge source, 57 and the important effect of cryogenic cooling was demonstrated. In general, the presence of certain cluster peaks in the mass spectra makes it possible to speculate about production and/or destruction mechanisms of certain molecular species in the plasma.…”