Apparatus and method for adjustment of ion separation resolution in FAIMS
First Claim
1. An apparatus for controllably varying specificity of a FAIMS-based ion separation, comprising:
- a first electrode surface portion defining an ion inlet within a portion thereof;
a second electrode surface portion defining an ion outlet within a portion thereof, the second electrode surface portion spaced-apart from the first electrode surface portion along a first direction and disposed in a facing relationship relative to the first electrode surface portion so as to define a FAIMS analyzer region therebetween;
an intermediate electrode disposed between the first electrode surface portion and the second electrode surface portion, the intermediate electrode for defining a transition point of an average ion flow path between the ion inlet and the ion outlet; and
,an actuator for controllably moving the intermediate electrode relative to each of the first electrode surface portion and the second electrode surface portion, for translating the transition point so as to controllably vary the length of the average ion flow path.
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Accused Products
Abstract
An apparatus for controllably varying specificity of a FAIMS-based ion separation includes a first electrode surface portion defining an ion inlet within a portion thereof and a second electrode surface portion defining an ion outlet within a portion thereof. The second electrode surface portion is spaced-apart from the first electrode surface portion along a first direction and disposed in a facing relationship relative to the first electrode surface portion so as to define a FAIMS analyzer region therebetween. An intermediate electrode is disposed between the first electrode surface portion and the second electrode surface portion, the intermediate electrode for defining a transition point of an average ion flow path between the ion inlet and the ion outlet. An actuator is provided for controllably moving the intermediate electrode relative to each of the first electrode surface portion and the second electrode surface portion, for translating the transition point so as to controllably vary the length of the average ion flow path.
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Citations
32 Claims
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1. An apparatus for controllably varying specificity of a FAIMS-based ion separation, comprising:
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a first electrode surface portion defining an ion inlet within a portion thereof; a second electrode surface portion defining an ion outlet within a portion thereof, the second electrode surface portion spaced-apart from the first electrode surface portion along a first direction and disposed in a facing relationship relative to the first electrode surface portion so as to define a FAIMS analyzer region therebetween; an intermediate electrode disposed between the first electrode surface portion and the second electrode surface portion, the intermediate electrode for defining a transition point of an average ion flow path between the ion inlet and the ion outlet; and
,an actuator for controllably moving the intermediate electrode relative to each of the first electrode surface portion and the second electrode surface portion, for translating the transition point so as to controllably vary the length of the average ion flow path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for controllably varying specificity of a FAIMS-based ion separation, comprising:
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providing a FAIMS analyzer region defined by a space between first and second spaced-apart electrode surfaces, the FAIMS analyzer region comprising an ion inlet end and an ion outlet end; providing an intermediate electrode between the first and second electrode surfaces, the intermediate electrode controllably movable relative to the first and second electrode surfaces for defining a transition point along an average ion flow path between the ion inlet end and the ion outlet end, the transition point for changing a direction of the average ion flow path; providing a first flow of ions at the ion inlet end of the FAIMS analyzer region; selectively transmitting a subset of the first flow of ions along the average ion flow path through the FAIMS analyzer region; moving the intermediate electrode relative to the first and second electrode surfaces, so as to change the length of the average ion flow path for providing a second average ion flow path length between the ion inlet end and the ion outlet end; and
,transmitting ions of a second flow of ions along the second average ion flow path length. - View Dependent Claims (23, 24, 25)
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26. A method for controllably varying specificity of a FAIMS-based ion separation, comprising:
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providing a FAIMS analyzer region having an ion inlet for introducing a flow of ions thereto and having an ion outlet for extracting a subset of the flow of ions that is selectively transmitted along an average ion flow path between the ion inlet and the ion outlet; introducing a first flow of ions into the FAIMS analyzer region via the ion inlet; selectively transmitting a subset of the first flow of ions along the average ion flow path; retaining the ion inlet and the ion outlet in fixed positions one relative to the other; varying the length of the average ion flow path so as to provide an average ion flow path of a different length through the FAIMS analyzer region; and
,transmitting ions of a second flow of ions along the average ion flow path of a different length. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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Specification