Isothiocyanates as derivatization reagents in the determination of 1,1-dimethylhydrazine by gas chromatography coupled with mass spectrometry
Alkyl isothiocyanates were proposed for the determination of 1,1-dimethylhydrazine (DMH)in the form of 4-alkyl-1,1-dimethylthiosemicarbazides by gas chromatography coupled with massspectrometry (GC-MS). 4-Alkyl-1,1-dimethylthiosemicarbazides are selectively formed under mild conditions in the absence of catalysts. During the chromatography, these thiosemicarbazidesare efficiently resolved from excess of alkyl isothiocyanates. A possibility of identification of DMH derivatives on the basis of the chromatographic retention parameters and fragmentation data under electron ionization conditions was demonstrated.
Detection of Alkylhydrazine Impurities in Hydrocarbon Rocket Propellants by Chromatography and Mass Spectrometry
Abstract: Procedures for qualitative and quantitative analysis of microimpurities of alkylhydrazines and their transformation products in hydrocarbon rocket propellants Naftil, Syntin, and Detsilin by gas and liquid chromatography with on-line and off-line mass-spectrometric detection were developed. Reliable detection of an unsymmetrical dimethylhydrazine impurity in Naftil multicomponent propellant and in its mixtures with other hydrocarbon propellants is possible in the form of thiosemicarbazides by reversed-phase high-performance liquid chromatography and matrix-assisted laser desorption/ionization mass spectrometry.
Polunin,Ul’yanov,Polunina,Buryak
p. 182 - 191
(2021/04/09)
Studying Products of Hydrazine Interaction with Isothiocyanates by Means of Chromatography and Mass Spectrometry
Abstract: Products of interaction between alkylhydrazines and ethyl-, allyl-, and phenylisothiocyanates are studied using mass spectrometry in the modes of electron impact ionization and matrix-assisted laser desorption/ionization in combination with gas
Buryak, A. K.,Polunin, K. E.,Polunina, I. A.,Ul’yanov, A. V.
p. 1061 - 1068
(2021/06/06)
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