MEKC-UV as an effective tool for the separation and identification of explosives, high explosives, and their degradation products in environmental samples.

ABSTRACT

MEKC has been used in conjunction with UV detection for identification and quantitation of high explosives in environmental samples. To ensure the compatibility of the technique with ESI-MS, perfluorooctanoic acid (PFOA), a volatile micelle, was used. Separation of EPA Method 8330 Mixes A and B using various concentrations of the micelle showed that the 80 mM solution of PFOA was the optimum concentration for the separation of the explosives. MEKC analysis of explosives with ESI-MS under optimum micelle concentration provided excellent results indicating the compatibility of the method with ESI-MS. Finally, the MEKC-UV method was applied to the detection and quantitation of explosives in various environmental samples including water, sand, and soil. The results demonstrate that the MEKC method described herein is a viable technique for detection of explosives in environmental samples using UV detection, while maintaining the compatibility of the technique with MS detection without any modification to the separation method, if laboratories decided to pursue this route in the future.