Arsenic sensor development based on modified with (E)-Nˊ-(2-Nitrobenzylidine)-benzenesulfonohydrazide: A real sample analysis†
(E)-Nˊ-(2-Nitrobenzylidene)-benzenesulfonohydrazide (NBBSH) was prepared from 2-nitrobenzaldehyde and benzenesulfonylhydrazine by using a simple condensation process with medium yield. It was then crystallized in methanol and characterized using various spectroscopic techniques such as Fourier Transform Infra-red spectroscopy (FTIR), Ultra-violet Visible spectroscopy (UV-Vis), Proton Nuclear Magnetic Resonance (1H-NMR), X-ray photoelectron spectroscopy (XPS), and Carbon-13 Nuclear Magnetic Resonance (13C-NMR). Structure of the NBBSH molecule was confirmed using a single crystal X-ray diffraction technique (SCXRDT). A thin layer of NBBSH slurry was deposited onto a cleaned and dried flat round surface of GCE with binding agent (Nafion) to fabricate a sensitive and selective heavy metal ion (HMI) sensor. Fabricated NBBSH/GCE sensor was exhibited and enhanced sensing performances such as sensitivity, limit of detection (LOD), linear dynamic range (LDR), and long-term stability towards selective arsenic ions. Calibration curve (CC) was found linear over in broad range of As3+ conc. (0.1 nM ~ 0.1 M) and calculated sensitivity and LOD (Based on 3N/S) were found as ~190.0 pAμM-1cm-2 and 50.0 pM respectively. This novel approach can be initiated as an efficient path for the development of HMI sensor regarding monitoring of hazardous materials in biological and environmental sciences.