Chemistry: analytical and immunological testing – Optical result – Spectrum analysis
Patent
1994-10-20
1998-02-17
Soderquist, Arlen
Chemistry: analytical and immunological testing
Optical result
Spectrum analysis
436106, 436166, 436169, G01N 3322, G01N 3300
Patent
active
057190615
ABSTRACT:
A method and apparatus for the detection of hydrazine, monomethylhydrazine, 1,1-dimethylhydrazine in air (or other gas medium) or in an aqueous solution. The detection is accomplished by introducing a stream of air, or other gas medium, or aqueous solution suspected of containing hydrazine, monomethylhydrazine, 1,1-dimethylhydrazine or mixtures thereof into a pH controlled reagent solution containing an aromatic dicarboxaldehyde to react with the hydrazine, monomethylhydrazine, 1,1-dimethylhydrazine or mixtures thereof, respectively, and by exposing the reacted reagent solution to an excitation wavelength range and monitoring an emission from the exposed reagent solution at an emission wavelength range to detect the presence of a hydrazine derivative, monomethylhydrazine derivative, 1,1-dimethylhydrazine derivative, or mixtures thereof (i.e. a derivative formed by the reaction between hydrazine, monomethylhydrazine, 1,1-dimethylhydrazine and the aromatic dicarboxaldehyde) indicating the presence of hydrazine, monomethylhydrazine, 1,1-dimethylhydrazine or mixtures thereof within the stream of air or other gas medium or aqueous solution.
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Letter from Lori Pickett of CPIA dated 04 Oct. 1994.
Collins Gregory E.
Rose-Pehrsson Susan
Edelberg Barry
McDonnell Thomas E.
Soderquist Arlen
The United States of America as represented by the Secretary of
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