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US 7,547,891 B2Granted
Ion sampling apparatuses in fast polarity-switching ion sources
AssigneeAgilent Technologies, Inc.
InventorsAlex Mordehai, Craig P. Love, Mark H. Werlich
Life of this patent
Estimating the term…
Abstract
The present invention provides ion sampling apparatuses that can be used in a fast polarity-switching electric field. In some embodiments, the ion sampling apparatus comprises a capillary made with an insulator, with a resistive inner or outer surface. Devices and systems comprising the ion sampling apparatuses, as well as methods of use thereof, are also provided.
Claims21
An ion source comprising:
- an ion generator;
- a capillary of an insulating or resistive material, the capillary having a front end and a rear end and a resistive inner surface, wherein the front end of the capillary is configured to receive ions from the ion generator;
- and
- a power supply applying a voltage potential to the front end of the capillary,
- wherein the polarity of the voltage potential alternates periodically.
2 more elements
A method for transporting ions through a capillary in a polarity-switching electric field, comprising:
- (a) providing:
- a capillary of an insulating or resistive material, the capillary having a front end and a rear end and a resistive inner surface, wherein the pressure at the front end is higher than the pressure at the rear end;
- and
- a power supply applying a voltage potential to the front end of the capillary, wherein the polarity of the voltage potential alternates periodically;
- and
- (b) exposing the front end of the capillary to ions so that ions of the opposite polarity to the polarity of the voltage potential are attracted to the front end of the capillary.
3 more elements
An ion source comprising:
- an ion generator;
- a capillary of an insulating or resistive material, the capillary having a front end and a rear end and a resistive outer surface, wherein the front end of the capillary is configured to receive ions from the ion generator;
- and
- a power supply applying a voltage potential to the front end of the capillary,
- wherein the polarity of the voltage potential alternates periodically.
2 more elements
Dependencies are inferred from the claim text.