Patent US4687929A successfully refreshed from Google Patents.
US4687929A
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Monodisperse aerosol generator
Assignee: Georgia Tech Research Corp
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Filing: 1985-09-11
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Granted: 1987-08-18
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Expires: 2005-09-11
Abstract
Abstract A monodisperse aerosol generator forms a stable jet of liquid at a velocity allowing columnar breakup into droplets of uniform size and spacing. To prevent degradation of the monodisperse aerosol, it is dispersed by entrainment in a high velocity gaseous stream. To provide an interface for direct injection into a mass spectrometer or to interface a liquid chromatograph with a mass spectrometer, the generator is followed by a desolvation chamber operating at about atmospheric pressure and a multistage pressure reducer which evacuates solvent vapor and gaseous medium to form a high momentum, solvent-depleted solute aerosol beam which is input into the mass spectrometer.
Inventors
- 👤 Richard F. Browner
- 👤 Ross C. Willoughby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:32
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/04; H01J49/0431; H01J49/0445; H01J49/045; B; B01; B01F; B01F23/00; B01F23/20; B01F23/21; B01F23/211; B05; B05B; B05B1/00; B05B1/02; G; G01; G01N; G01N30/00; G01N30/02; G01N30/62; G01N30/72; G01N30/7233; G01N30/724; G01N30/7246; G01N30/7293; G01N30/7206; G01N30/7213; G01N30/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A method of introducing solute recovered from effluent of a liquid chromatograph into a mass spectrometer, which comprises the steps of: (a) generating a monodisperse aerosol of predetermined uniform droplet size from the effluent by delivering the effluent through a conduit at a velocity such that monodisperse droplet formation occurs in the absence of outside disturbances; (b) providing a dispersing gas; (c) dispersing the droplets with gas just after droplet formation; (d) entraining the aerosol in qas and desolvating the aerosol at substantially atmospheric pressure; (e) expanding the components of step (d) into a low pressure environment while removing gas therefrom to form a high momentum monodisperse aerosol beam of solute particles; and (f) directing said beam into a mass spectrometer.
Claim 2
Independent Claim
121 words
A method of introducing solute recovered from effluent of a liquid chromatograph into a mass spectrometer, which comprises the steps of: (a) generating a monodisperse aerosol of predetermined uniform droplet size from the effluent by delivering the effluent through a conduit at a velocity such that monodisperse droplet formation occurs in the absence of outside disturbances; (b) providing a dispersing gas; (c) dispersing the droplets with gas just after droplet formation; (d) entraining the aerosol in qas and desolvating the aerosol at substantially atmospheric pressure; (e) expanding the components of step (d) into a low pressure environment while removing gas therefrom to form a high momentum monodisperse aerosol beam of solute particles; and (f) directing said beam into a mass spectrometer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |