Radiant energy – Ionic separation or analysis – With sample supply means
Reexamination Certificate
2005-09-27
2005-09-27
Lee, John R. (Department: 2881)
Radiant energy
Ionic separation or analysis
With sample supply means
C250S287000, C250S286000, C250S282000
Reexamination Certificate
active
06949740
ABSTRACT:
An improved lens for collecting and focusing dispersed charged particles or ions having a stratified array of elements at atmospheric or near-atmospheric pressure, each element having successively smaller apertures forming a tapered terminus, wherein the electrostatic DC potentials are applied to each element necessary for focusing ions through the stratified array for introducing charged particles and ions into the vacuum system of a mass spectrometer. Embodiments of this invention are methods and devices for improving sensitivity of mass spectrometry when coupled to both high and low electrostatic field atmospheric pressure ionization sources.
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Sheehan Edward William
Willoughby Ross Clark
Lee John R.
Smith II Johnnie L
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