Screening of 1,1-dimethylhydrazine transformation products on shungite surface by MALDI mass spectrometry
Abstract
1,1-dimethylhydrazine (unsymmetrical dimethyl hydrazine, UDMH) is a fuel component which is
widely used in launch vehicles. When released into the environment UDMH undergoes oxidative transformation
resulting in formation of a wide range of toxic products. In order to eliminate the negative impact of the
propellant spills, the crash sites of the launch vehicles stages are treated with the material on the basis of
shungite. An important task of environmental safety is the rapid detection of UDMH and its transformation
products on the shungite surface. The application of MALDI mass spectrometry for screening of the UDMH
transformation products is described in the present work, the adsorption of these compounds on the surface of
shungite is studied. It is shown that the toxic components in real UDMH samples subjected to oxidation can
be detected by means of MALDI mass-spectrometry. The study of the adsorption of these components from
aqueous solutions showed that shungite sorbed relatively high molecular weight compounds at a higher rate,
while for solutions in pyridine rapid sorption of low molecular weight compounds, including NDMA (the
most toxic of the UDMH transformation products) was observed.
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References
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