Instrument for separating ions in time as functions of preselected ion mobility and ion mass
US7077944B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 2003 |
| Grant date | Jul 18, 2006 |
| Priority date | — |
| Expiry date | May 15, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/004
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ion separation instrument includes an ion source coupled to at least a first ion mobility spectrometer having an ion outlet coupled to a mass spectrometer. Instrumentation is further included to provide for passage to the mass spectrometer only ions defining a preselected ion mobility range. In one embodiment, the ion mobility spectrometer is provided with electronically controllable inlet and outlet gates, wherein a control circuit is operable to control actuation of the inlet and outlet gates as a function of ion drift time to thereby allow passage therethrough only of ions defining a mobility within the preselected ion mobility range. In another embodiment, an ion trap is disposed between the ion mobility spectrometer and mass spectrometer and is controlled in such a manner so as to collect a plurality of ions defining a mobility within the preselected ion mobility range prior to injection of such ions into the mass spectrometer. In yet another embodiment, an ion inlet of the ion trap may be electronically controlled relative to operation of the ion mobility spectrometer as a function of ion drift time to thereby allow passage therein only of ions defining a mobility within t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.