Programmed sample pyrolysis for mass spectrometer

Details Programmed sample pyrolysis for mass spectrometer Programmed sample pyrolysis for mass spectrometer

1979-08-06

1981-02-17

Dixon, Harold A.

Radiant energy

Ionic separation or analysis

250282, 250425, H01J 2700, B01D 5944

Patent

active

042517257

ABSTRACT:
Pyrolyzing apparatus for a mass spectrometer includes a sample holder in the form of a small glass rod having in the end thereof a cylindrical depression of a predetermined small volume. The indentation is to be filled with the predetermined quantity of the substance to be analyzed. The rod is inserted into a supporting structure with the sample holding depression immediately adjacent the ionizing chamber of a quadrupole mass spectrometer. Surrounding the end of the glass rod holding the sample is a heater element which is energized in accordance with a predetermined program to rapidly raise the temperature of the sample to a predetermined initial level, then to increase the temperature of the sample in accordance with an exponential curve to a maximum of a predetermined temperature level. The shape of the sample holder is such that, under the influence of the heat, substantially all of the pyrolyzed molecules will be directed into the ionization chamber where the molecules will be ionized. The ionized molecules will then be directed into the quadrupole separator, toward a collector.

REFERENCES:
patent: 3336475 (1967-08-01), Kilpatrick
patent: 3996469 (1976-12-01), Janes
patent: 4122343 (1978-10-01), Risby et al.
patent: 4124801 (1978-11-01), Cook et al.
patent: 4163153 (1979-07-01), Tamura

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