用氟硼酸根离子选择性电极电位滴定法测定复合推进剂中的高氯酸铵

POTENTIOMETRIC TITRATION OF PERCHLORATE AMMONIUM IN COMPOSITE PROPELLANTS WITH FLUOROBORATE ISE

本法用BF_4^-电极作指示电极,双液接饱和甘汞电极作参比电极,用十六烷基三甲基氯化铵(CETAC)或氯代十六烷基吡啶(CPC)电位滴定用水提取的复合推进剂中的高氯酸铵。其平均回收率达99.75%,准确度和精密度优于中和法(甲醛法)。

The method presented here for the potentiometrie titration of ammonium perchlorate in composite propellants uses cetyltrimethylammonium chloride (CETAC) or cetylpyridinium chloride (CPC) as the titrant. The titration is performed with a fluoroborate ion-selective electrode as the indicator electrode and a double-junction calomel electrode as the reference electrode. This new method is suitabie for the determination of NH_4ClO_4 in a variety of propellants, with this method the mean recovery and σ attain values better than 99.74% and 0.24 respectively.