Ion Chromatographic Analysis of Ammonium Dinitramide–Oxidizer for Propellant and Pyrotechnic Applications

Authors

  • Rajeev Raghavan,

    Corresponding author
    1. Analytical and Spectroscopy Division, Propellants, Polymers, Chemicals, and Materials Entity, Vikram Sarabhai Space Centre, Thiruvananthapuram – 695 022, India
    • Analytical and Spectroscopy Division, Propellants, Polymers, Chemicals, and Materials Entity, Vikram Sarabhai Space Centre, Thiruvananthapuram – 695 022, India
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  • Salu Jacob

    1. Analytical and Spectroscopy Division, Propellants, Polymers, Chemicals, and Materials Entity, Vikram Sarabhai Space Centre, Thiruvananthapuram – 695 022, India
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Abstract

Analysis of ammonium dinitramide (ADN), the advance rocket propellant oxidizer, in pure form as well as in mixtures was carried out by ion chromatography (IC). The purity of ammonium dinitramide was directly determined by estimating the dinitramide ions and indirectly by estimating the impurities. Both methods gave results comparable with those determined by Differential Scanning Calorimetry and UV spectroscopy. The chemical composition of ADN in mixtures containing nitrate, chromate, chlorate, perchlorate, and thiocyanate ions was quantitatively estimated in the same solution without any interferences or prior separation of analyte ions. The newly developed ion chromatographic methods for the analysis of ADN are simple and fast with good accuracy and precision when compared to other analytical techniques. The IC methods are found to be highly suitable for quality control analysis of ADN containing compositions and for the online process monitoring of the formation of ADN in the reaction mixture.

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