Heating – Work chamber having heating means – Having means by which work is progressed or moved mechanically
Patent
1990-01-30
1991-04-23
Yuen, Henry C.
Heating
Work chamber having heating means
Having means by which work is progressed or moved mechanically
432152, 432253, 432227, F27B 902
Patent
active
050095919
ABSTRACT:
A pyrolyzer for gas chromatography having a subsidiary heater and a main heater. The subsidiary heater is set below the pyrolysis temperature of the sample, e.g., at 300 degrees centigrade, to drive volatile components from the sample. The main heater is set at a pyrolysis temperature to pyrolize the sample, e.g., at 600 degrees centigrade. The sample is placed in the pyrolyzer in a sample vessel that can be positioned to be heated by main heater, the subsidiary heater and a position not heated by either the main heater or the subsidiary heater.
REFERENCES:
patent: 4412812 (1983-11-01), Sadowski et al.
patent: 4586898 (1986-05-01), Orbeck
patent: 4610628 (1986-09-01), Mizushina
patent: 4627814 (1986-12-01), Hattori et al.
patent: 4752216 (1988-06-01), Hurrell
J. Chih-An Hu, Chromatopyrography Analysis of Rubbers and Other High Polymers, Journal of Chromatographic Science, 19, (Dec. 1981).
S. Liebman, E. Levy, Advances in Pyrolysis GC Systems: Applications to Modern Trace Organic Anlaysis, Journal of Chromatographic Science, 21, (Jan. 1983).
N. Iglauer, F. Bentley, Pyrolysis GLC for the Rapid Identification of Organic Polymers, Journal of Chromatographic Science, 12, 23-33 (Jan. 1974).
Stevens Timothy S.
The Dow Chemical Company
Yuen Henry C.
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