Method of monitoring oxygen concentrations in gas streams

Details Method of monitoring oxygen concentrations in gas streams Method of monitoring oxygen concentrations in gas streams

1980-01-28

1981-06-09

Marcus, Michael S.

Chemistry: physical processes

Physical processes

Crystallization

23927, 422 52, G01N 2176

Patent

active

042722497

ABSTRACT:
The concentration of oxygen in a gas stream is determined by passing the gas stream through an optical absorption cell maintained above about 100.degree. C., sealing off the cell, injecting sufficient amount of nitrogen oxide, NO, to react with all of the oxygen in the gas stream, and determining the absorbance of nitrogen dioxide, NO.sub.2, formed in that reaction. This method is quick, accurate, and independent of gas flows or gas pressure.

REFERENCES:
patent: 2389046 (1945-11-01), Hare
patent: 3528779 (1970-09-01), Fontijn
patent: 3718429 (1973-02-01), Williamson, Jr.
patent: 3970430 (1976-07-01), Reader, Jr. et al.
patent: 4042333 (1977-08-01), Dell et al.
An Optical Detection Method for NO in the Range of 10.sup.-2 to 10.sup.3 ppm by the Chemiluminescent Reaction of NO with O.sub.3.
Stuhl et al., Tech. Rep. No. SR-70-42, Mar. 23, 1970.
"461 NO.sub.x Analyzer System", (Du Pont).

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