A New Electrochemical Approach for the Determination of Phenylhydrazine in Water and Wastewater Samples using Amplified Carbon Paste Electrode

An electroanalytical sensor amplified with NiO-SWCNTs nanocomposite and 1-hexyl-3-methylimidazolium chloride (HMC) was fabricated and used for determination of phenylhydrazine as a water contaminant. The NiO/SWCNTs nanocomposite was synthesized by a simple and one-pot method (chemical precipitation in this case) and characterized by FESEM and EDS methods. In continuous, NiO-SWCNTs/HMC/CPE was used as working electrode for investigation electrochemical behavior of phenylhydrazine. In compare to unmodified electrode, oxidation signal of phenylhydrazine was improved about 6.8 times and results confirm a linear dynamic range between 3.0 nM – 350 μM with detection limit 0.8 nM using differential pulse votammetric method (DPV). The ability of NiOSWCNTs/ HMC/CPE as an analytical tool was check for determination of phenylhydrazine in water samples and results confirm powerful ability of suggested sensor for this goal with recovery data 97.8% - 104.35%.