电位滴定法测定火药中硫酸钾含量

用电位滴定法测定了单基火药中的 K2 SO4 含量 ,结果表明 ,用丙酮溶解单基药试样 ,以 75 %的丙酮为滴定介质 ,测定结果的误差小于 2 % ,标准偏差为 0 .0 2 ;用浓硝酸破坏试样 ,以 70 %的乙醇为滴定介质 ,误差小于 0 .2 % ,回收率达 99.8%以上 ,标准偏差为0 .0 0 1

The Method of Determination of K2SO4 Content in Propellant by Potentiometric Trituration

After testing the K 2SO 4 content in propellant by means of poteniometric trituration,it can be concluded that if the sample of propellant is used to dissolve acetone on the condition that 75% acetone is its trituration medium,the error of the testing results is less than 2%,and its standard error is 0.02.Furthermore, if concentrated nitric acid is used to destroy the sample,on the condition that 70% alcohol is its trituration medium,the error is less than 0.2%,and its recycling rate will be over 99.8%,thus the standard error is 0.001.