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✦   LIBER   ✦

Internal glow discharge-fourier transform ion cyclotron resonance mass spectrometry

✍ Scribed by K.L. Goodner; K.E. Milgram; C.H. Watson; J.R. Eyler; C. Dejsupa; C.M. Barshick

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
935 KB
Volume
7
Category
Article
ISSN
1044-0305

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✦ Synopsis

A glow discharge (GD) ion source has been developed to work within the high magnetic field of a Fourier transform ion cyclotron resonance @I'ICR) mass spectrometer. Characterization of this source revealed that the optimum operating voltage, pressure, and current are significantly lower than those for normal glow discharges. The sputter rate was lowered to 1/3Oth of that found with a normal glow discharge source operated external to the high magnetic field region. Operation of the GD source closer to the FTICR analyzer cell than with previous experimental designs resulted in improved ion transport efficiency. Preliminary results from this internal GD source have established detection limits in the low parts per million range for selected elemental species. (

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