A vacuum-assisted in-needle capillary adsorption trap (VA-INCAT) device for sampling and delivering materials to an analytical device is disclosed. A sorbent is multiwall carbon nanotube/polyaniline (PANI/MWCNT) nanocomposite and is coated within an interior space of the needle between the second end and the side aperture to entrap an analyte within a sample. The VA-INCAT device also includes a vacuum device configured to vacuum the vacuum flask to improve the extraction of the analytes vapors from the sample matrix to the sorbent bed.
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