Akademik Veri Yönetim Sistemi
ELECTROCHIMICA ACTA, cilt.539, 2025 (SCI-Expanded, Scopus)
Resorcinol is a phenolic compound used in the manufacture of resins, plastics, dyes, medicine, and also as a propellant stabilizer. A novel sensor electrode was developed for the simultaneous determination of dihydroxybenzene (DHB) isomers-resorcinol (RC), hydroquinone (HQ), and catechol (CT)-as well as for investigating the electrochemical behavior of RC in separate explosive mixtures. In addition, the electrochemical behavior of RC in a nitroxyl radical environment was investigated, and possible interaction mechanisms were proposed. The glassy carbon electrode was modified with gold nanoparticles (AuNPs) and a 4-nitroaniline (4-NA) monomer, followed by over-oxidation in 0.1 mol L-1 NaOH, resulting in a highly sensitive and selective electrode (GC/ AuNPs/r-pNAover-oxidized). The polymeric material 4-NA was selected for its hydrogen bonding capability, and over-oxidation ensured the formation of a uniform, thin polymer layer. Optimal analytical conditions, including buffer type, pH, monomer concentration, and over-oxidation time, were systematically optimized. Semiderivative voltammetry (SDV), derived from linear sweep voltammetry (LSV), was employed as the electrochemical method for DHB isomer analysis. Linear working ranges were obtained as 0.8-500 mu mol L- 1, 0.6-500 mu mol L- 1 and 2-1000 mu mol L- 1 for RC, HQ, and CT, respectively. For the simultaneous determination of dihydroxy benzene isomers (with an obvious separation of characteristic peak potentials), the linear operating range was found to be 2-20 mu mol L- 1. Using this method, RC can be determined in wastewater in the presence of various potential interferents (up to 50-fold concentrations). Statistical validation against an HPLC method using t- and F-tests confirmed the accuracy and reliability of the proposed electrochemical approach, demonstrating its effectiveness for environmental and energetic material applications.