Electrospray and atmospheric pressure chemical ionization source

Details Electrospray and atmospheric pressure chemical ionization source Electrospray and atmospheric pressure chemical ionization source

1997-01-31

1998-12-01

Anderson, Bruce

Radiant energy

Ionic separation or analysis

With sample supply means

250281, B01D 5944, H01J 4900

Patent

active

058442375

ABSTRACT:
Improvements have been made to the Electrospray and Atmospheric Pressure Chemical Ionization source chambers interfaced to mass spectrometers to simplify source performance optimization and source operation and to improve system sensitivity. The atmospheric pressure ion source procedure for optimizing performance has been simplified by adding windows along the sides of the atmospheric pressure ionization chamber allowing direct viewing of the Electrospray and Atmospheric pressure ion sources during operation. A cylindrical lens which extends along the side walls of the atmospheric pressure chamber has been configured to be semitransparent for viewing into the chamber. This cylindrical shaped side lens is electrically isolated from the Electrospray liquid introduction needle and Electrospray chamber endplate. Improved Electrospray mass spectrometer system sensitivity can be achieved when operating the cylindrical lens with a higher potential difference between it and the Electrospray liquid introduction needle than is set between the needle and the endplate.

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