Sampling system for use with surface ionization spectroscopy
First Claim
1. A gas ion separator comprising:
- (a) at least two substantially co-axial tubes, where a proximal tube of the at least two substantially co-axial tubes is positioned closest to an external ionization source and a distal tube of the at least two substantially co-axial tubes is positioned furthest from the external ionization source, where the proximal tube and the distal tube are spaced such that there is a gap between the proximal tube and the distal tube, where a vacuum region is operably connected to the gap; and
(b) a grid operably connected to the proximal tube.
1 Assignment
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Accused Products
Abstract
In various embodiments of the invention, a device permits more efficient collection and transmission of ions produced by the action of a carrier gas containing metastable neutral excited-state species into a mass spectrometer. In one embodiment of the invention, the device incorporates the source for ionization in combination with a jet separator to efficiently remove excess carrier gas while permitting ions to be more efficiently transferred into the vacuum chamber of the mass spectrometer. In an embodiment of the invention, improved collection of ions produced by the carrier gas containing metastable neutral excited-state species at greater distances from between the position of the analyte and the position of the mass spectrometer are enabled.
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Citations
20 Claims
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1. A gas ion separator comprising:
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(a) at least two substantially co-axial tubes, where a proximal tube of the at least two substantially co-axial tubes is positioned closest to an external ionization source and a distal tube of the at least two substantially co-axial tubes is positioned furthest from the external ionization source, where the proximal tube and the distal tube are spaced such that there is a gap between the proximal tube and the distal tube, where a vacuum region is operably connected to the gap; and (b) a grid operably connected to the proximal tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A gas ion separator comprising:
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three or more substantially co-axial tubes; and a grid operably connected to one of the three or more substantially co-axial tubes, where the three or more substantially co-axial tubes are spaced such that there is one or more gaps between at least two of the three or more substantially co-axial tubes, where a proximal tube of the three or more substantially co-axial tubes is positioned closest to an external ionization source, where at least one of the one or more gaps is operably connected to a vacuum region. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A spectroscopic device comprising:
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(a) an external ionization source; (b) a spectroscopic analyzer; (c) a proximal tube closest to the external ionization source and a distal tube furthest from the external ionization source, where the proximal tube and the distal tube are substantially co-axial, where the proximal tube and the distal tube are spaced such that there is a gap between the proximal tube and the distal tube; (d) a grid operably connected to the proximal tube; and (e) a vacuum region operably connected to the gap. - View Dependent Claims (17, 18, 19, 20)
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Specification