Cavitand-Based Solid-Phase Microextraction Coating for the Selective Detection of Nitroaromatic Explosives in Air and Soil

摘要: A selective cavitand-based solid-phase microextraction coating was synthesized for the determination of nitroaromatic explosives and explosive taggants at trace levels in air soil. quinoxaline cavitand functionalized with a carboxylic group upper rim used to enhance selectivity toward analytes containing nitro groups. The fibers were characterized terms film thickness, morphology, thermal stability, pH resistance. An average thickness 50 (±4) μm, stability until 400 °C, an excellent fiber-to-fiber batch repeatability RSD lower than 4% obtained. capabilities developed sampling proved achieving LOD values low ppbv ng kg–1 range, respectively, soil samples.