Models and calibration in methods involving glow-discharge sampling

Models and calibration in methods involving glow-discharge sampling 

Hyperbolic, parabolic and exponential equations were developed at an early stage for evaluation in emission spectroscopy with GD lamps. Because of analogies between 

Devices for treatment prior to introduction into atomic spectrometers 

The influence of cathode geometry in a dcGD ion source for MS has also been modelled [223]. Flow charts of programmes for constructing databases of tables and of the programme to find emission lines under various search conditions have been provided by Wagatsuma [224]. 

Dynamic range extension in GD quadrupole/ion-trap MS based on selective ion-accumulation (e.g. by mass-selective instability, single-frequency resonance ejection, combined rf-dc and entrance end-cap dc methods) allows the selective accumulation of the analyte ions and enables the dynamic range to be increased by a factor of 105 [233]. The linearities and relative trapping efficiencies of the previous methods were assessed with respect to the injection time and the methods were used for the GD ion-trap MS determination of major and minor constituents in NIST SRM 1103 Free Cutting Brass. 

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