近年来,国内多次发生硝铵炸药自燃自爆的重大事故。一些不法分子,为提高硝铵炸药的爆轰感度,在硝铵炸药中加入氯酸盐,而此种炸药受热或受震就可能起爆,甚至于散热不良都可能自爆。此类炸药爆炸以后,爆炸残留物的检验中可检出氯酸根离子,这是区别于其它种类的硝铵炸药爆炸的一个显著特征。因此,能否对准确测定氯酸根,对事件原因的调查起着至关重要的作用,而离子色谱法应该是氯酸根检测的最佳手段。土壤样品经水振荡浸提后,离心取上清液过滤膜和OnGuard II RP柱后可直接进样,前处理步骤非常简单。硝铵炸药爆炸后的尘土中含有很高浓度的硝酸根,但由于氯酸根和硝酸根分离性能相似,这就给低含量氯酸根测定造成了一定困难。选择使用IonPac AS柱进行分离,则可解决这个问题,实验发现即使高达000mg/L的硝酸根亦不影响低浓度氯酸根的测定,如
From the results obtained by the confocal Raman mapping it is possible to distinguish three main components in the explosive contamination. These have been confirmed as RDX, PETN and binder.It can be seen that there is a close positional correlation between the white light image and the images generated by Raman mapping.