US4535235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for injection of ions into an ion cyclotron resonance cell
Assignee: Thermo Finnigan LLC
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Filing: 1983-05-06
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Granted: 1985-08-13
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Expires: 2003-05-06
Abstract
Abstract A mass spectrometer having an ion cyclotron resonance analyzer cell disposed in a homogenous magnetic field with an ionizer outside the magnetic field for forming ions to be analyzed in the cell and an interface for introducing ions from said ionizer into said ion cyclotron resonance cell for analysis.
Inventors
- 👤 Robert T. McIver, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:56
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/06; H01J49/062; H01J49/063; H01J49/26; H01J49/34; H01J49/36; H01J49/38; H01J49/42; H01J49/4205; H01J49/421; H01J49/4215
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
80 words
A mass spectrometer including (a) an ion cyclotron resonance cell disposed in a homogeneous magnetic field; (b) means located outside said uniform magnet field for ionizing a sample to be analyzed to form sample ions; (c) filter means for selectively introducing sample ions from the ionizing means into the ion cyclotron resonance cell from said location outside said uniform magnetic field; and (d) means for accelerating ions in said ion cyclotron resonance cell for detection of said introduced sample ions.
Claim 2
Dependent Claim
80 words
A mass spectrometer including (a) an ion cyclotron resonance cell disposed in a homogeneous magnetic field; (b) means located outside said uniform magnet field for ionizing a sample to be analyzed to form sample ions; (c) filter means for selectively introducing sample ions from the ionizing means into the ion cyclotron resonance cell from said location outside said uniform magnetic field; and (d) means for accelerating ions in said ion cyclotron resonance cell for detection of said introduced sample ions.
Claim 3
Dependent Claim
76 words
A mass spectrometer as in claim 1 wherein said filter means for selectively introducing sample ions into the ion cyclotron resonance cell comprises at least one quadrupole mass filter having a rod assembly which extends into or extends in close proximity to the homogeneous magnetic field and means for introducing sample ions from the ionizing means into said quadrupole filter whereby the ions are directed into the ion analyzer cell by said quadrupole mass filter means.
Claim 4
Dependent Claim
31 words
A mass spectrometer as in claim 2 wherein said homogeneous magnetic field extends beyond said cell and wherein said filter extends into the part of said homogeneous field outside said cell.
Claim 5
Dependent Claim
31 words
A mass spectrometer as in claim 1 including mass selection means disposed between the ionizing means and filter means for selectively introducing the sample ions into the ion cyclotron resonance cell.
Claim 6
Dependent Claim
40 words
A mass spectrometer as in claim 4 in which said mass selection means comprises a quadrupole section operated with both RF and DC voltages and in which said ion introducing means include a second quadropole section operated with RF voltages.
Claim 7
Dependent Claim
23 words
A mass spectrometer as in claim 1 in which said means for ionizing the sample comprises an electron beam for ion impact ionization.
Claim 8
Dependent Claim
16 words
A mass spectrometer as in claim 1 in which said means for ionizing comprises particle bombardment.
Claim 9
Dependent Claim
16 words
A mass spectrometer as in claim 1 in which said means for ionizing comprises laser ionization.
Claim 10
Dependent Claim
18 words
A mass spectrometer as in claim 1 in which said means for ionizing comprises high pressure chemical ionization.
Claim 11
Dependent Claim
16 words
A mass spectrometer as in claim 1 in which said means for ionizing comprises thermal ionization.
Claim 12
Dependent Claim
24 words
A mass spectrometer as in claim 1 in which said means for accelerating ions comprise means for performing Fourier transform ion cyclotron resonance analysis.
Claim 13
Dependent Claim
28 words
A mass spectrometer as in claim 2 in which means are provided for trapping said ions in said ion analyzer cell after they are introduced into the cell.
Claim 14
Independent Claim
55 words
The method of conducting ion cyclotron resonance analysis of samples in an ion resonance spectrometer including an ion analyzer cell which comprises the steps of ionizing the sample outside of the homogeneous magnetic field associated with the spectrometer, selecting ions in a predetermined mass range and introducing into the analyzer cell the selected ionized atoms.
Claim 15
Independent Claim
55 words
The method of conducting ion cyclotron resonance analysis of samples in an ion resonance spectrometer including an ion analyzer cell which comprises the steps of ionizing the sample outside of the homogeneous magnetic field associated with the spectrometer, selecting ions in a predetermined mass range and introducing into the analyzer cell the selected ionized atoms.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-12 | 1989-02-11 | 1989-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-12 | 1993-02-11 | 1993-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-12 | 1997-02-11 | 1997-08-13 | $7700.00 | Window Closed / Lapsed |