固相微萃取和GC/MS分析JOB炸药老化释放气氛

Analyzing the Gases Released from Aged JOB Explosives by Using Solid Phase Microextraction Coupled with GC/MS

采用3种不同吸附性能萃取头的固相微萃取器对JOB炸药在自然密封存放和加热老化一定时间后所释放出来的微量气氛进行了萃取吸附研究,采用GC/MS测试技术对其进行了定性分析。研究结果表明,固相微萃取装置对该炸药老化过程中释放的微量无机气体和有机挥发性组分具有选择性吸附和萃取浓缩作用,峰强度显示不同老化条件下放出的气体组分和含量具有不同的结果。初步探讨了老化释放气体的机理,JOB炸药老化放出的主要是一些合成溶剂、杂质等。

Three kinds of adsorbant solid phase microextractions (SPME) were used to study the gases released from aged JOB explosives. These gases were obtained by storing the explosives in a closed vessel and heating them for a certain period of time. The extraction and adsorption properties of these SPMEs and the qualitative identification of the gas components have been examined by using SPME coupled with GC/MS analytical techniques. The results show that SPMEs can adsorb selectively and preconcetrate the trace organic volatiles (such as solvents, impurities) and some inorganic gases from explosives and its pertinent materials aged at different conditions. Furthermore, the ageing mechanism of JOB explosives was also explored.