Voltammetric determination of hydrogen peroxide content in peracetic acid disinfectant

Abstract

Aim of Work. This study presents the development and validation of a voltammetric method for the quantitative determination of hydrogen peroxide (HP) in the peracetic acid-based disinfectant Delakson. Methodology. The method employs cathodic voltammetry using a carbositall rotating electrode (CRA) as both the working and auxiliary electrode. Measurements were conducted in the potential range of +1.0 to –1.0 V versus a saturated Ag/AgCl/KCl reference electrode. Scientific Novelty. The study offers a novel application of cathodic voltammetry with a carbositall rotating electrode for precise HP determination in a commercial disinfectant matrix. The method demonstrated high linearity, sensitivity, and precision, with low LOD (2.15×10⁻⁵ mol L⁻¹) and LOQ (7.18×10⁻⁵ mol L⁻¹) values, making it a robust analytical tool for real-world applications. Conclusions. The proposed voltammetric method is reliable, sensitive, and precise for determining hydrogen peroxide in peracetic acid-based disinfectants. It demonstrated excellent reproducibility (RSD values of 0.028, 0.018, and 0.011) and accuracy (relative errors from –0.77% to +0.92%), with successful application to the Delakson formulation (RSD = 0.012, relative error = +1.69%).