A new method for electrostatic ion deflection.
J Am Soc Mass Spectrom
; 1(1): 28-36, 1990 Feb.
Article
em En
| MEDLINE
| ID: mdl-24248609
ABSTRACT
A new approach to electrostatic ion deflection is described where an electrostatic particle guide (EPG) operating with reversed polarity is used to deflect ions in a cylindrical geometry about the axis of a time-of-flight mass spectrometer. The method has advantages over the standard parallel-plate deflector geometry in that it is more effective in deflecting ion beams that have a significant radial velocity component. The device is being used in (252)cs Cf plasma desorption mass spectrometry ((252)cs Cf -PDMS) experiments in an on/off mode to record neutral particle spectra and in a synchronized pulsed mode to reduce the magnitude of the uncorrelated background in the time-of-flight spectrum. Radial distribution functions have been measured for various EPG voltages. Its use as a background suppression technique is demonstrated by using the (252)cs Cf-PDMS spectrum of insulin. (28-36).
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MEDLINE
Idioma:
En
Ano de publicação:
1990
Tipo de documento:
Article