FAIMS apparatus and method for separating ions in the gas phase
First Claim
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1. A method of separating ions comprising the steps of:
- providing an analyzer region that is operable in both an rf-only mode and in a FAIMS mode;
introducing ions into the analyzer region;
effecting a selective separation of the ions within the analyzer region substantially during operation in the FAIMS mode;
controllably switching the analyzer region from the FAIMS mode to the rf-only mode; and
,extracting the selectively separated ions from the analyzer region substantially during operation in the rf-only mode.
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Abstract
Disclosed is a high field asymmetric waveform ion mobility spectrometer (FAIMS) including a set of spaced-apart parallel rods, the space between the parallel rods having first and second ends and defining an analyzer region. The apparatus includes an electrical controller for electrically coupling to the set of parallel rods, for applying at least an rf-voltage between the parallel rods of the set of parallel rods in a first operating mode and for applying a combination of an asymmetric waveform voltage and a direct current voltage between the parallel rods of the set of parallel rods in a second operating mode.
31 Citations
36 Claims
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1. A method of separating ions comprising the steps of:
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providing an analyzer region that is operable in both an rf-only mode and in a FAIMS mode; introducing ions into the analyzer region; effecting a selective separation of the ions within the analyzer region substantially during operation in the FAIMS mode; controllably switching the analyzer region from the FAIMS mode to the rf-only mode; and
,extracting the selectively separated ions from the analyzer region substantially during operation in the rf-only mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 28, 29, 30, 31, 32, 33, 35, 36)
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19. An apparatus for separating ions comprising:
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a set of parallel rods having a space therebetween, the space having first and second ends and defining an analyzer region; and
,an electrical controller for electrically coupling to the set of parallel rods, for applying a radio frequency (rf)-voltage between the parallel rods of the set of parallel rods in a rf-only operating mode, for applying a combination of an asymmetric waveform voltage and a direct current voltage between the parallel rods of the set of parallel rods in a FAIMS operating mode, and for controllably switching between the rf-only operating mode and the FAIMS operating mode, wherein, during use, an ion which is being transmitted through the analyzer region is subjected to the rf-only operating mode and to the FAIMS operating mode during a period of time the ion is resident within the analyzer region. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 34)
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Specification