Radical indicator reaction for determination of 1,1-dimethylhydrazineстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 24 февраля 2021 г.
Аннотация:2,3,5-Triphenyl-2H-tetrazolium chloride (TPT) has been proposed as a redox indicator for determination of 1,1-dimethylhydrazine (DMH) which is used as a rocket propellant. It has been found that TPT is a sensitivechromogenic reagent due to its potentiometric and spectral characteristics. Products of the reaction betweenDMH and TPT have been characterized by mass spectrometry and EPR spectroscopy. In the EPR studies, C,Ndiphenylnitrone(DPN) has been used as the radical trap and the obtained data indicate the radical nature of thereaction. The EPR spectrum of a mixture containing DPN and DMH has been recorded and calculated, whereasthe spectrum of a three-component mixture containing DPN, TPT, and DMH is measured but it is complex forinterpretation. A passive chemical dosimeter as a paper indicator strip with a polymer substrate impregnatedwith TPT has been manufactured and tested for continuous monitoring and determination of DMH in air in outof-laboratory conditions at a concentration as low as 0.006 mg/m3 (warehouse operation area) and 0.5 mg/m3 (awarehouse box).