Vahideh Masoumi - Department of Drug and Food Control, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
Ali Mohammadi - Department of Drug and Food Control, Faculty of Pharmacy,Tehran University of Medical Sciences, Tehran, Iran . Nanotechnology Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran

In this work, the polyaniline fibers were prepared electrochemically using cyclic voltammetry (CV) method with CF3COOH as dopant. Different parameters including acid concentration, monomer concentration, scan rate, and amount of MWCNTs were studied by means of the one-factor-at-a-time method . Then, headspace solid-phase microextraction process coupled with gas chromatography and flame ionization detector was used for comparing extraction capability of benzaldehyde from aqueous solution. The morphology and texture of polyaniline fibers were examined by field emission scanning electron microscopy and Fourier transform infrared spectroscopy analyses. The attained results revealed that the perfect conditions for acid concentration, aniline concentration, scan rate, and multiwalled carbon nanotubes content were 0.5 M, 0.2 M, 25 mV s−1, and 0.02 wt%, respectively. The limit of detection for the proposed polyaniline fiber was 15 ng ml−1.

Polyaniline- Multiwalled carbon nanotubes- Electrochemical- Solid-phase microextraction- Benzaldehyde