FAIMS having a displaceable electrode for on/off operation
First Claim
1. A system for analyzing ions, comprising:
- an ion source for generating ions;
a High Field Asymmetric Waveform Ion Mobility Spectrometry (FAIMS) cell comprising;
(a) a gas inlet;
(b) an outer electrode having a generally concave inner surface and comprising;
(i) an ion inlet operable to receive the ions from the ion source and a carrier gas from the gas inlet; and
(ii) an ion outlet; and
(c) an inner electrode having a conduit therethrough and having a generally convex outer surface comprising a cylindrical surface having a cylindrical axis that is disposed in a spaced-apart and facing arrangement relative to the inner surface of the outer electrode for defining an ion separation region therebetween; and
a mass analyzer for mass analyzing ions transmitted by the FAIMS cell through the ion outlet,wherein the inner electrode is moveable between a first position and a second position, the first position facilitating movement of the ions through the ion separation region, the second position facilitating movement of the ions through the conduit.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for analyzing ions comprises: an ion source; a FAIMS cell comprising: (a) a gas inlet; (b) an outer electrode having a generally concave inner surface and comprising: (i) an ion inlet operable to receive the ions from the ion source and a carrier gas from the gas inlet; and (ii) an ion outlet; and (c) an inner electrode having a conduit therethrough and having a generally convex outer surface that is disposed in a spaced-apart and facing arrangement relative to the inner surface of the outer electrode for defining an ion separation region therebetween; and a mass analyzer for mass analyzing ions transmitted by the FAIMS cell through the ion outlet, wherein the inner electrode is moveable between a first position and a second position, the first position facilitating movement of the ions through the ion separation region, the second position facilitating movement of the ions through the conduit.
-
Citations
13 Claims
-
1. A system for analyzing ions, comprising:
-
an ion source for generating ions; a High Field Asymmetric Waveform Ion Mobility Spectrometry (FAIMS) cell comprising; (a) a gas inlet; (b) an outer electrode having a generally concave inner surface and comprising; (i) an ion inlet operable to receive the ions from the ion source and a carrier gas from the gas inlet; and (ii) an ion outlet; and (c) an inner electrode having a conduit therethrough and having a generally convex outer surface comprising a cylindrical surface having a cylindrical axis that is disposed in a spaced-apart and facing arrangement relative to the inner surface of the outer electrode for defining an ion separation region therebetween; and a mass analyzer for mass analyzing ions transmitted by the FAIMS cell through the ion outlet, wherein the inner electrode is moveable between a first position and a second position, the first position facilitating movement of the ions through the ion separation region, the second position facilitating movement of the ions through the conduit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A system for analyzing ions, comprising:
-
an ionization chamber; an atmospheric pressure ion source within the ionization chamber for generating ions; a first reduced pressure chamber; an ion transfer tube having a first end disposed within the ionization chamber for receiving ions from the ion source and a second end disposed within the first reduced pressure chamber; a heater in thermal contact with the ion transfer tube applying heat to the ion transfer tube; a carrier gas conduit for introducing a flow of carrier gas into the ion transfer tube; a High Field Asymmetric Waveform Ion Mobility Spectrometry (FAIMS) cell within the first reduced pressure chamber comprising; (a) an outer electrode having a generally concave inner surface and comprising; (i) an ion inlet operable to receive the ions and the carrier gas from the second end of the ion transfer tube; and (ii) an ion outlet; and (b) an inner electrode having a conduit therethrough and having a generally convex outer surface comprising a cylindrical surface having a cylindrical axis that is disposed in a spaced-apart and facing arrangement relative to the inner surface of the outer electrode for defining an ion separation region therebetween; a mass analyzer for mass analyzing ions transmitted by the FAIMS cell through the ion outlet; and a housing of the mass analyzer comprising at least one evacuated chamber fluidically coupled to the ion outlet of the FAIMS cell, wherein the inner electrode is moveable between a first position and a second position, the first position facilitating movement of the ions through the ion separation region, the second position facilitating movement of the ions through the conduit.
-
-
11. A system for analyzing ions, comprising:
-
an ion source for generating ions; a High Field Asymmetric Waveform Ion Mobility Spectrometry (FAIMS) cell comprising; (a) a gas inlet;
(b) an outer electrode having a generally concave inner surface and comprising;(i) an ion inlet operable to receive the ions from the ion source and a carrier gas from the gas inlet; and (ii) an ion outlet; and (c) an inner electrode having a conduit therethrough and a generally convex outer surface comprising a cylindrical surface having a cylindrical axis that is disposed in a spaced-apart and facing arrangement relative to the inner surface of the outer electrode for defining an ion separation region therebetween; a mass analyzer for mass analyzing ions transmitted by the FAIMS cell through the ion outlet, the mass analyzer separated from the FAIMS cell by a gap therebetween; a gas-tight coupling between the FAIMS cell and the mass analyzer within the gap; and at least one vacuum port coupled to the mass analyzer for maintaining the mass analyzer and the FAIMS ion separation region at sub-atmospheric pressure, wherein the inner electrode is moveable between a first position and a second position, the first position facilitating movement of the ions through the ion separation region, the second position facilitating movement of the ions through the conduit. - View Dependent Claims (12, 13)
-
Specification