Modified carbon paste electrode based on nanotechnology for determining phenol in the liquid solutions by cyclic voltammetry and comparing to high-performance liquid Chromatography

In this paper, phenol was determined in a liquid solution based on fabricating phenol-selective electrode by cyclic voltammetry (CV). The carbon paste modified with nickel oxide nanoparticles (NiO) which were doped nitrogen quantum dots (NCQD) as the NiO-NCQD nanocomposite. manufactured laboratory at optimized pH. condition, best results created pH 7.0 and 4.0 using KH2PO4 buffer solution. By voltammetry, voltage optimized, value for voltages obtained 0.04166V 0.05991V 4 7, respectively. scan rate (SR) studied SR achieved 100 mv s-1 both Due to results, wide linear dynamic range between 10 1000 μM obtained. Also, standard analyzed high-performance chromatography (HPLC). retention time (RT), wavelength maximum (λ max: nm), peak area equation of HPLC 2.982 min, 270 nm, (Area=40420CPhenol+ 43.557), respectively concentration 0.1-5.0 mg L-1. adsorbent compared it technique.