Hyphenation of gas chromatography and mass spectrometry was applied to the determination of N-nitrosodimethylamine(NDMA), a probable degradation compound of 1,1-dimethyl hydrazine,in 1,1-dimethylhydrazine containing waste water,using selected ion monitoring mode.

The extraction conditions of Coriander leaf essential oil by ultrasonic method and the inhibitory effects on the formation of N-nitrosodimethylamine and elimination of sodium nitrite were studied.

Taking methanol and water volumetric ratio of 5 ∶95 as mobile phase,trace nitrosodimethylamine(NDMA) was separated and determined by C18 column,ultraviolet detector when using reverse phase high performance liquid chromatogram.

Determination of the content of N-Dimethyl nitrosamine by Gas Chromatography-mass Spectrometry;

Hydrolysis of tctranitro hcmi glycoluril(TNHG)was studied under different conditions, it's the first time to find that TNHG could hydrolysis to produce methylene dinitramine, and 1,3 dinitro 4,5 dinitroamino imidazolidine, another hydrolysis product of TNHG, could further hydrolysis to yield methylenedinitramine also.