Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1975-02-18
1976-07-13
Smith, Alfred E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250343, G01J 100
Patent
active
039696260
ABSTRACT:
Disclosed herein is a method for detecting total reduced sulfur in a sample gas, comprising the steps of: introducing sample gas into a sample cell, passing detecting radiation of a wavelength between about 250 and about 330 nm. through the sample gas, detecting the intensity of the detecting radiation passing through the sample gas, introducing an oxygen-containing gas into the cell to form a gas mixture with a sample gas, heating the gas mixture to a temperature above about 200.degree.C., passing the detecting radiation through the heated gas mixture in the cell, and detecting the intensity of the detecting radiation passing through the gas mixture. The difference between the intensity of the detecting radiation passing through the gas mixture and that passing through the sample gas alone is indicative of the total reduced sulfur content of the sample gas. An apparatus to practice the above method is also disclosed.
REFERENCES:
patent: 3013153 (1961-12-01), Fisher et al.
patent: 3449565 (1969-06-01), Barringer
patent: 3696247 (1972-10-01), McIntosh et al.
patent: 3835322 (1974-09-01), Komatsuru
patent: 3845309 (1974-10-01), Helm et al.
Anderson B. C.
E. I. Du Pont de Nemours and Company
Smith Alfred E.
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