Modern Methods of Analysis for Control of Continuous Nitroguanidine Process
ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER DOVER NJ LARGE CALIBER WEAPON SYSTEMS LAB
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Modern instrumental methods of analyses with high potential for automated on-line adaptability have been developed for the monitoring and quality control of the British aqueous fusion continuous nitroguanidine process at the Sunflower Army Ammunition Plant SFAAP, Desoto, Kansas. The methods involve the utilization of polarography, ultraviolet absorption spectrophotometry, and ion chromatography interfaced with dedicated microprocessors. The procedures obviate the need for classical wet chemical analyses and the time necessary to run a complete analysis of a multi-component mixture is accomplished well within a 30-minute period, with no sacrifice in analytical accuracy and precision. Anions, cations, as well as non-ionic species, present in the various process streams as complex mixtures, are capable of being resolved into their separate constituent parts and quantified by the dedicated microprocessors. These species are carbonate, nitrate, sulfate, fluoride, guanidinium, calcium and ammonium ions and sulfur, cyanamide, and nitroguanidine compounds. The capability represented by these methods is in keeping with the time constraints of the modern continuous nitroguanidine production line at SFAAP.
- Ammunition and Explosives