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US3974380A Expired / Lapsed US ⏱️ 0.0 years remaining

Mass spectrometer

Assignee: Balzers Patent und Beteiligungs AG
•
Filing: 1975-01-17
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Granted: 1976-08-10
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Expires: 1995-01-17
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Abstract

Abstract The mass spectrometer is of the type having a mass-spectrometric separation system located in an evacuable chamber, an inlet to the chamber for the gases to be examined, and an ion source and a detector for the gas mixture constituting auxiliary devices in the chamber and having walls. The gas inlet and the auxiliary devices are arranged in series, with the gas inlet being formed as an inlet nozzle operable to form a jet of the gas to be examined and so designed, relative to the auxiliary devices, as to direct the jet, as a molecular beam, through one auxiliary device without contacting a wall thereof so that the jet enters directly into the other auxiliary device. The ion source is arranged between the detector and the nozzle, and may be designed as a hot-cathode ion source. The detector may be designed as a hot-cathode ionization detector or as an ion source of a second mass-spectroscopic separation arrangement. The detector may also be designed as an oscillator-crystal measuring device for measuring constituents of the gas deposited by condensation on one surface of the oscillator crystal. The mass-spectroscopic separation device may be designed as a quadrupole mass spectrometer.

Inventors

  • 👤 Gerhard Rettinghaus
  • 👤 Rudolf Fluckiger

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 21:03
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/24

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 152 words
In a gas-chromatographic detector comprising a mass-spectrometric ion separation system located in an evacuable chamber, a sample gas inlet to the chamber including nozzle means for forming a gas jet, from the sample gas delivered from a gas-chromatographic column into the chamber, an ionization device for the sample gas, and in which the gas jet formed by the nozzle passes through the ionization device without contacting the walls thereof while being ionized, means for passing ions formed by said ionization device into said separation system and a first ion responsive detector placed to receive ions from said separation system, the improvement comprising a second detector which is responsive to the ions formed of the components of the sample gas but not to the gas-chromatographic carrier gas, the arrangement being such that the sample-gas jet leaving said nozzle passes in a substantially straight line through said ionization device directly into said second detector
Claim 2
Dependent Claim 152 words
In a gas-chromatographic detector comprising a mass-spectrometric ion separation system located in an evacuable chamber, a sample gas inlet to the chamber including nozzle means for forming a gas jet, from the sample gas delivered from a gas-chromatographic column into the chamber, an ionization device for the sample gas, and in which the gas jet formed by the nozzle passes through the ionization device without contacting the walls thereof while being ionized, means for passing ions formed by said ionization device into said separation system and a first ion responsive detector placed to receive ions from said separation system, the improvement comprising a second detector which is responsive to the ions formed of the components of the sample gas but not to the gas-chromatographic carrier gas, the arrangement being such that the sample-gas jet leaving said nozzle passes in a substantially straight line through said ionization device directly into said second detector
Claim 3
Dependent Claim 22 words
In a chromatographic detector, the improvement claimed in claim 1, in which said second detector is designed as a surface ionization detector.
Claim 4
Dependent Claim 22 words
In a chromatographic detector, the improvement claimed in claim 1, in which said ionization device is designed as a hot-cathode ion source.
Claim 5
Dependent Claim 22 words
In a chromatographic detector the improvement claimed in claim 1, in which said second detector is designed as a hot-cathode ionization detector.
Claim 6
Dependent Claim 27 words
In a chromatographic detector, the improvement claimed in claim 1, in which said second detector is designed as an ion source of a second mass-spectroscopic separation arrangement.
Claim 7
Dependent Claim 43 words
In a chromatographic detector, the improvement claimed in claim 1, in which said second detector is designed as an oscillator-crystal measuring device for measuring constituents of the gas mixture, to be examined, deposited by condensation on one of the surfaces of the oscillator-crystal.

References Cited (Backward Citations)

US2836750A Cited
US3553451A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-08-10 1980-02-09 1980-08-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-08-10 1984-02-09 1984-08-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-08-10 1988-02-09 1988-08-10 $7700.00 Window Closed / Lapsed

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