Detection of hydrazine compounds in gaseous samples by their con

Details Detection of hydrazine compounds in gaseous samples by their con Detection of hydrazine compounds in gaseous samples by their con

1987-01-05

1988-10-04

Richman, Barry S.

Chemistry: analytical and immunological testing

Nitrogen containing

422238, 436111, 436128, 436155, 436158, 436159, 436160, G01N 2176, G01N 3112

Patent

active

047756330

ABSTRACT:
Disclosed is a method and apparatus for detecting hydrazine, monomethylhydrazine (MMH), and unsymmetrical dimethylhydrazine (UDMH) in a gaseous sample. The hydrazine compound detector includes a sample converter wherein vapors of an aldehyde such as acetaldehyde or a ketone such as acetone are mixed with a sample in gaseous form, and the mixture is allowed to react to form azine and hydrazone derivatives of the aldehyde or ketone. The derivatives may be transported long distances and then analyzed, as by heating in the presence of an oxidant in a pyrolyzer containing a nickel surface to produce nitric oxide (NO), followed by measurement of the NO in a NO detector such as a chemiluminescent analyzer.

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