Hygiene and Sanitation №5 2008

Kuznetsova L. V., Yegorova G. I., Mironov A. A.

Gas chromatographic determination of N,N-asymmetric dimethylhydrazine in different environmental objects

The paper describes different guidelines used to develop a procedure for gas chromatographic determination of N,N-asymmetric dimethylhydrazine (NDMH) in various environmental objects in the area of a missile-dismantling base.
The authors showed that the use of a capillary column with a 5-μm liquid phase layer on a Kristall-5000 chromatograph with a nitrogenous phosphoric detector (Russia) allowed development of a unified gas chromatographic procedure for determining NDMH in air, water, soil, biological material (urine), and plant cover (moss, couch-grass).
The procedures differ in the way how to prepare samples and the analysis itself is based on conversion of NDMH to N,N-dimethylhydrazone-4-nitrobenzaldehyde, its liquid extraction from water, concentration of the extract via evaporation and assay by the internal standard test.