Abstract
In this article, a detection method for organic explosives by capillary electrophoresis (CE) is developed based on previous detection techniques. Firstly, a buffer solution consisting of 50 mmol·L-1 sodium dodecyl sulfate (SDS), 20 mmol·L-1 sodium tetraborate and 5% methanol was prepared and the UV detection in this buffer solution was conducted for three common organic explosives, including TNT, DNT and PETN. Then, the capillary UV detection method was investigated in terms of the transition time repeatability, the linear relationship between mass concentration and peak area and the limit of detection. The results revealed good reliability and stability of this method. In addition, these samples were characterized by photodiode array detector (PDA) to verify the qualitative results of UV detection.
Highlights
The TNT and DTN and PETN are the most widely used violent explosives in virtue of their availability, facile preparation, good portability and user-friendly implementation
capillary electrophoresis (CE) is applied for the analysis of three widely used organic explosives (TNT, DNT and PETN) in terms of the transition time, peak height, peak area and 3D spectrum to facilitate the development of a facile, rapid and cost-effective detection method for organic explosives
This study serves as a pioneer work in the detection of organic explosives by CE in China
Summary
The TNT and DTN (homologues, both are nitro explosives) and PETN (nitrate explosive) are the most widely used violent explosives in virtue of their availability, facile preparation, good portability and user-friendly implementation. A variety of detection methods for these explosives have been developed, including gas chromatography (GC) [1]-[5], liquid chromatography (LC) [6]-[13], ion chromatography (IC) [14]-[16], spectrum analysis and thermo analysis [17]. CE is applied for the analysis of three widely used organic explosives (TNT, DNT and PETN) in terms of the transition time, peak height, peak area and 3D spectrum to facilitate the development of a facile, rapid and cost-effective detection method for organic explosives. Capillary electrophoresis (CE) is a liquid-phase separation technique based on the differences in the mobility and distribution of different components under high-voltage electric fields. Milli2QÒ ultra-pure water purifier by USA Millipore Company, METTLERAE240 electronic balance, 10 1000 μl automatic pipetting gun, disposable pipettes, measuring cylinders and beakers were used
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