Radiant energy – Ionic separation or analysis – Methods
Patent
1980-11-17
1983-05-10
Anderson, Bruce C.
Radiant energy
Ionic separation or analysis
Methods
250288, 250423P, B01D 5944
Patent
active
043831710
ABSTRACT:
A system is provided for analyzing the particles in aerosols, as in making air pollution studies, which enables the making of rapid chemical analyses of particles. The system includes an apparatus for producing a controlled stream of individual particles to be analyzed from an environment, and an apparatus for vaporizing and ionizing the particles while they move in free flight, for analysis by a mass spectrometer. The apparatus for producing a stream of particles includes a capillary tube through which the air with suspended particles moves, a skimmer device having a small opening spaced from an end of the capillary tube to receive particles passing through the tube, and a vacuum pump for pumping air out of the space between the tube and skimmer. The vacuum pump serves to remove much of the gas from around the particles, while also creating an inflow of air and particles through the capillary tube. The particles passing through the skimmer opening can be simultaneously vaporized and ionized while in free flight, by a laser beam of sufficient intensity that is directed across the path of the free flying particles.
REFERENCES:
patent: 3436966 (1965-04-01), Netusil et al.
patent: 3808433 (1974-04-01), Fite et al.
patent: 3914655 (1975-10-01), Dreyfus et al.
patent: 4105921 (1978-08-01), Bartlett
patent: 4140905 (1979-02-01), Polanyi
Friedlander Sheldon K.
Giffin Charles E.
Norris David D.
Sinha Mahadeva P.
Anderson Bruce C.
Jones Thomas H.
Manning John R.
McCaul Paul F.
The United States of America as represented by the Administrator
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