Fabrication of Highly Selective Sensor for the Determination of Iron

Narendra Kumar

Abstract: A ligand named, ((E) - 2 - ethoxy - 6 ((pyren - 1 - ylimino) methyl) phenol) has been synthesized and scrutinized to fabricate iron (III) - selective sensor. The addition of sodium tetraphenyl borate and various plasticizers, viz? chloronaphthalene (CN), 2 - nitrophenyloctyl (NPOE), benzyl acetate (BA), and dibutylphalate (DBP) has been used to substantially improve the performance of the sensor. The membrane of various compositions of the ligand were investigated and it was found that the best performance was obtained for the membrane of the composition (I) (5mg): PVC (75mg): chloronaphthalene (100mg): sodium tetraphenyl borate (4mg). the sensor showed a linear potential response to iron (III) over wide concentration range 6.8 ? 10 - 6 to 1.0 ? 10 - 1 M (detection limit 5.0 ? 10 - 6 M) with Nernstian slope (20.0 mV/decade of activity) between pH 2.5 and 5.5 with a quick response time of 20 s. The potentiometric selectivity coefficient values as determined by match potential method (MPM) indicate excellent selectivity for iron ions over interfering cations. The sensor exhibits adequate life of 2 months with good reproducibility. The sensor could be used in direct potentiometry.

Keywords: Schiff base ligand, Iron (III) - selective sensor, Chemical sensor, Potentiometry

How to Cite?: Narendra Kumar, "Fabrication of Highly Selective Sensor for the Determination of Iron", Volume 13 Issue 6, June 2024, International Journal of Science and Research (IJSR), Pages: 676-679, https://www.ijsr.net/getabstract.php?paperid=SR24607121445, DOI: https://dx.doi.org/10.21275/SR24607121445