Abstract: An integrated ion focusing and gating lens for use in an ion trap mass spectrometer includes first and second members of combined generally cylindrical configuration with the members focusing an ion beam along an axis of the generally cylindrical configuration when biased with the same voltage on each member, and the members deflecting an ion beam when the members are biased with different voltages. In a preferred embodiment, the first and second members are identical in configuration.

Abstract: An ion source for use in mass spectrometry, and particularly an atmospheric pressure chemical ionization (APCI) source, comprises a chamber having a central axis, a sample conduit that includes a sample outlet communicating with the chamber, an ionizing device disposed downstream from the sample conduit, and a gas conduit that includes a gas outlet communicating with the chamber. The gas conduit defines a flow path directed into the chamber. The flow path includes a velocity component that is tangential with respect to the central axis of the chamber. The gas so directed into the chamber establishes a vortex gas flow therein, forcing the sample emitted from the sample outlet to flow toward the heated wall of the chamber. Vaporization of the sample prior to ionization is consequently improved.

Abstract: An ion source for use in mass spectrometry, and particularly an atmospheric pressure chemical ionization (APCI) source, comprises a chamber having a central axis, a sample conduit that includes a sample outlet communicating with the chamber, an ionizing device disposed downstream from the sample conduit, and a gas conduit that includes a gas outlet communicating with the chamber. The gas conduit defines a flow path directed into the chamber. The flow path includes a velocity component that is tangential with respect to the central axis of the chamber. The gas so directed into the chamber establishes a vortex gas flow therein, forcing the sample emitted from the sample outlet to flow toward the heated wall of the chamber. Vaporization of the sample prior to ionization is consequently improved.

Abstract: An integrated ion focusing and gating lens for use in an ion trap mass spectrometer includes first and second members of combined generally cylindrical configuration with the members focusing an ion beam along an axis of the generally cylindrical configuration when biased with the same voltage on each member, and the members deflecting an ion beam when the members are biased with different voltages. In a preferred embodiment, the first and second members are identical in configuration.