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US 2011/0210244 A1Published application
Practical ion mobility spectrometer apparatus and methods for chemical and/or biological detection
AssigneeExcellims Corporation
InventorChing Wu
Life of this patent
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Abstract
This invention describes an ion mobility spectrometer system for chemical detection in the field. The system allows: a high throughput operation, an interface to new ionization methods, and an interface to a mass spectrometer.
Claims10
A method of mass analyzing mobility separated ions, comprising:
- generating ions in front of an IMS;
- separating ions in the IMS and transporting ions in the front of a vacuum inlet;
- collecting a section of mobility separated ions into the vacuum inlet in the direction that is perpendicular ion drift direction;
- and measuring mass to charge ratio in a MS.
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A apparatus for introducing ions into a vacuum comprising:
- an ion source for generating ions;
- a means for transporting ions into an ion extraction zone near vacuum inlet;
- a plurality of electrodes creating an electric field inside the ion extraction zone wherein a pulse of high electric field is applied;
- and a low electric field zone between the ion extraction zone and a vacuum inlet.
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A apparatus of mass analyzing mobility separated ions, comprising:
- an IMS having an inlet at first end accepting ions from an ion source;
- subsequently mobility separating ions along a first axis;
- an ion extraction zone locating between the first end and the other end of the IMS for exporting ions from the IMS in the direction that is substantially perpendicular to the first axis;
- and an TOFMS having an interface receiving a section of mobility separated ions in the direction that is perpendicular to the first axis and mass separating the ions along a second axis.
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Dependencies are inferred from the claim text.