Aniline-naphthylamine copolymer as sorbent for needle trap device

In current work, aniline-naphthylamine copolymers were prepared using electrochemical technique and then applied as a new sorbent for needle trap extraction of some volatile organic compounds from aqueous solution in headspace mode. The scanning electron microscopy and infrared spectrometry techniques were used to characterization of synthesized aniline-naphthylamine copolymers of aniline and naphthylamine. The results showed that aniline-naphthylamine copolymer compared to unmodified polymer, has higher porosity and non-uniform structures. The significant parameters of the sorbent preparation and extraction process such as the type and concentration of polymer, time and voltage of electrochemical deposition, the extraction time and temperatures and salt content were studied and optimized. The modified device is sensitive and fast providing good analytical parameters so that the detection limit of 0.9-2 ng L − 1 and the quantification limit of 3–7 ng L − 1 along with equilibrium time of 20 minutes were obtained. The linearity of method was obtained in the range of 15-1500 ng L − 1 with R 2  > 0.9996. The method repeatability was considered at 50 ng L − 1 and relative standard deviations of 3–5% were obtained. To finish, the performance of proposed device was studied via the extraction of selected analytes in real water samples and the relative recovery values were found to be in the range of 94–102%, showing no matrix effect.