气相色谱法测定钝感发射药中聚酯含量

Determination of Polyester in Desensitized Gun Propellant by Gas Chromatography

建立了一种气相色谱测定钝感发射药中聚酯含量的分析方法。选用浓度为250 g·L-1的氢氧化钾溶液对聚酯进行降解处理,降解产物经色谱柱分离后,取一聚酯特征峰作为代表进行定量。聚酯含量在3～6 g·L-1时,峰面积与含量呈良好线性,相关系数为0.996,平均回收率为100.2%,相对标准偏差为1.51%。该方法重复性好,回收率高,适合于钝感发射药中聚酯含量测定。

A method to determine the content of polyester in desensitized gun propellant by gas chromatography（GC） was established.The polyester was degraded by sodium hydroxied solution,and the products of degradation were analyzed by GC.Results show that there is good relationship between content of polyester and peak area.The linear range is between 3-6 g·L-1,and the correlation coefficient is 0.996.The average recovery is 100.2%,and the relative standard deviation is 1.51%.The method is characterized by good repertability and accuracy,which shows that the method is promising in the analysis of polyester in desensitized gun propellant.