High field asymmetric waveform ion mobility spectrometer FAIMS
First Claim
1. A high field asymmetric waveform ion mobility spectrometer (FAIMS) apparatus for separating one type of ion from a mixture including a plurality of different types of ions, comprising:
- a plurality of first electrode portions, each first electrode portion of the plurality of first electrode portions having a first length and an outer surface that is at least partially curved in a direction transverse to the first length;
a plurality of second electrode portions interleaved in a repeating sequence with the plurality of first electrode portions, each second electrode portion of the plurality of second electrode portions having a second length and an outer surface that is at least partially curved in a direction transverse to the second length, a space between the outer surface of a first electrode portion and the outer surface of an adjacent second electrode portion defining a portion of an analytical gap for separating the one type of ions from the mixture including the plurality of different types of ions; and
,at least an electrical controller for electrically coupling to at least one of the plurality of first electrode portions and the plurality of second electrode portions, for applying an asymmetric waveform voltage between the plurality of first electrode portions and the plurality of second electrode portions and for applying a direct current voltage between the plurality of first electrode portions and the plurality of second electrode portions so as to establish an electric field within the portion of the analytical gap, whereby ions propagating along a direction that is transverse to both the first length and the second length are separated in the portion of the analytical gap between the outer surface of the first electrode portion and the outer surface of the adjacent second electrode portion.
2 Assignments
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Accused Products
Abstract
Disclosed is an apparatus for separating ions including a plurality of first electrode portions, each first electrode portion of the plurality of first electrode portions having a first length and an outer surface that is at least partially curved in a direction transverse to the first length. The apparatus also includes a plurality of second electrode portions arranged in an alternating sequence with the plurality of first electrode portions, each second electrode portion of the plurality of second electrode portions having a second length and an outer surface that is curved in a direction transverse to the second length, a space between the outer surface of a first electrode portion and the outer surface of an adjacent second electrode portion defining a portion of an analytical gap for separating ions. At least an electrical controller is provided for electrically coupling to at least one of the plurality of first electrode portions and the plurality of second electrode portions, for applying an asymmetric waveform voltage between the at least one of the plurality of first electrode portions and the plurality of second electrode portions and for applying a direct current voltage between the at least one of the plurality of first electrode portions and the plurality of second electrode portions so as to establish an electric field within the portion of the analytical gap. During use, ions propagating along a direction that is transverse to both the first length and the second length are separated in the portion of the analytical gap between the outer surface of the first electrode portion and the outer surface of the adjacent second electrode portion.
26 Citations
14 Claims
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1. A high field asymmetric waveform ion mobility spectrometer (FAIMS) apparatus for separating one type of ion from a mixture including a plurality of different types of ions, comprising:
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a plurality of first electrode portions, each first electrode portion of the plurality of first electrode portions having a first length and an outer surface that is at least partially curved in a direction transverse to the first length; a plurality of second electrode portions interleaved in a repeating sequence with the plurality of first electrode portions, each second electrode portion of the plurality of second electrode portions having a second length and an outer surface that is at least partially curved in a direction transverse to the second length, a space between the outer surface of a first electrode portion and the outer surface of an adjacent second electrode portion defining a portion of an analytical gap for separating the one type of ions from the mixture including the plurality of different types of ions; and
,at least an electrical controller for electrically coupling to at least one of the plurality of first electrode portions and the plurality of second electrode portions, for applying an asymmetric waveform voltage between the plurality of first electrode portions and the plurality of second electrode portions and for applying a direct current voltage between the plurality of first electrode portions and the plurality of second electrode portions so as to establish an electric field within the portion of the analytical gap, whereby ions propagating along a direction that is transverse to both the first length and the second length are separated in the portion of the analytical gap between the outer surface of the first electrode portion and the outer surface of the adjacent second electrode portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A high field asymmetric waveform ion mobility spectrometer (FAIMS) apparatus for separating one type of ion from a mixture including a plurality of different types of ions, comprising:
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a housing including a first surface and a second surface spaced-apart from the first surface and facing the first surface, an inlet aperture defined within the first surface and an outlet aperture defined within the second surface; a plurality of rod-shaped electrodes disposed between the first surface and the second surface such that each rod-shaped electrode of the plurality of rod-shaped electrodes is approximately parallel to both the first surface and the second surface, each rod-shaped electrode of the plurality of rod-shaped electrodes having a length and being spaced-apart from an adjacent rod-shaped electrode, so as to define an analytical gap extending between the inlet aperture and the outlet aperture for allowing ions to propagate therebetween along a direction of travel that is transverse to the length; and
,at least an electrical controller for electrically coupling to at least some rod-shaped electrodes of the plurality of rod-shaped electrodes, for establishing an electric field within the analytical gap by the application of an asymmetric waveform voltage to the at least some rod-shaped electrodes of the plurality of rod-shaped electrodes and by the application of a direct current voltage to one of the at least some rod-shaped electrodes of the plurality of rod-shaped electrodes and other rod-shaped electrodes of the plurality of rod-shaped electrodes. - View Dependent Claims (12, 13, 14)
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Specification