The alkali titration with acetone as auxiliary reagent is used to analyze the HAN component in the liquid propellant (LP) crude material. The precision is satisfactory. The TEAN is usually anlysed by titration in non-aqueous medium
but the method can- not used for LP which is an aqueous solution. The authors make an approach to analyze TEAN in LP by potentiometric titration. It is shown that the results is more reliable than those with two-colour indicator.