火工药剂中铬酸钡和镁粉含量测定方法的改进

Improvement on Method of Determining Barium Chromate and Magnesium Content in Pyrotechnic Compositions

确定了一种快速准确的火工药剂中铭酸钡和镁粉含量测定方法。将火工药剂中的组分和有机粘合剂分离。用稀盐酸溶解试样，过滤，用铭酸钾沉淀铭酸钡，用EDTA滴定镁离子和钡镁离子总量，从而通过计算得出铭酸钡和镁粉的含量。实验表明本方法回收率为98.60%-99.91%，并且稳定，可靠。

The determination of barium chromate and magnesium powder content in pyrotechnic compositions was researched, and an effective method has been found. After washing away the organic binder ,the pyrotechnic composition was tully dissolved in the diluted hydrochloric acid. And after filtration, the magnesium ion and magnesium-barium ion was tested by EDTA complexonmetric titration measurement, so from which the magnesium and barium was derived. The result show that this method is accurate, the recovery is between 98.60 % and 99.91%, and its stability is good.