A novel method of developing nanostructured silver oxide film based aqueous voltammetric pesticide sensor

摘要

The present invention relates to construction of aqueous voltammetric sensor for pesticide toxins, for example, endosulfan, atrazine, methyl parathion etc, which is sensitive, reliable, precise, portable, with high resolution and reusable and amenable for field monitoring studies. 1) Mechanical & sonochemical polishing and electrochemical conditioning of polycrystalline silver electrode. 2) Formation of nano-structured silver oxide film by repeated potentiodynamic cycling in the potential range -0.3 to + 0.5 V vs Ag/AgCl. 3) Voltammetric transducer based electrochemical sensing in NaOH -Na2HPO4 sample media. The designed sensor is cut above the hither to reported sensors in terms of sensitivity, precision and in offering wider calibration range. The developed sensor can find wide spread use in environmental screening & monitoring, chemical industry, clinical diagnostics and other related fields for selected pesticides.