Abridged Spectrophotometric Method For The Determination of Available Stabilizer Content and Application to Prediction of Safe Life of Propellants

摘要

An abridged spectrophotometric method has been developed for the determination of available stabilizer content of propellants containing diphenylamine or ethyl centralite. This is accomplished by steam dis-tillation from alkaline solution and subsequent absorbance measurement at a wavelength suitable for the particular stabilizer. Total assaying time is less than one hour. The method has been applied to artificially aged propellants and indicates a regular decrease of stabilizer content with time. An empirical mathematical relationship has been derived for the rate of decay of stabilizer and the equation has been applied to predicting available stabilizer content at any given time.