3870468 is referenced by 14 patents and cites 6 patents.

A method and apparatus for converting nitrogen dioxide to nitric oxide for the ultimate reaction with ozone to cause a chemiluminescent reaction, the intensity of which is a function of the nitric oxide concentration. The method comprises passing the nitrogen dioxide through a small, confined volume and applying concentrated heat to the volume in the presence of suitable amounts of vitreous carbon. In one preferred embodiment the apparatus includes a quartz container and a filament constructed of vitreous carbon. In an alternative embodiment, loose vitreous carbon or a vitreous carbon rod is confined within the quartz container, and heat is applied by a heated stainless steel or nichrome filament surrounding the quartz container.

Nitrogen dioxide analysis
Application Number
Publication Number
Application Date
June 16, 1972
Publication Date
March 11, 1975
Neti Radhakrishna M
Harder P R
Steinmeyer R J
Beckman Instruments
H05b 03/10
G01n 31/12
G01N 21/76
G01N 31/00
G01N 33/00
C01B 21/26
C01B 21/00
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