Determination of resorcinol used as ammunition stabilizer by voltammetric sensor

Due to the widespread use of resorcinol (RC) both as a raw material in industrial production and as a stabilizer in energetic substance formulations, the sensitive and selective determination of resorcinol (RC) in wastewater alongside its isomers (Hydroquinone (HQ) and Catechol (CT)) and in explosive mixtures has been an important research topic in recent years. In this regard, many methods have been developed in the literature for the determination of RC as an environmental pollutant in wastewater, but no electrochemical method has allowed the simultaneous determination of its isomers. At the same time, in this thesis, for the first time electrochemically stabilizing properties in explosive mixtures were investigated. The developed sensor electrode (GC/AuNPs/AuNPs/r-pNAoxidized) and method (SDV) enabled the simultaneous determination of resorcinol and its isomers as well as their determination in separate explosive mixtures, namely RDX, TNT and NG. In addition, electrochemical behavior of resorcinol in nitroxyl radical environment was investigated and possible interaction mechanisms were proposed. When optimum conditions were provided, linear working ranges were obtained as 0.8-500 μM, 0.6-500 μM and 2-1000 μM for RC, HQ and CT, respectively. For the simultaneous determination of dihydroxy benzene isomers (with obvious separation of characteristic peak potentials), the linear operating range was found to be 2-20 μM. Using the developed sensor electrode and method, RC can be determined in wastewater in the presence of various ions (up to 50-fold) that may cause interference. Finally, the developed method was statistically validated against the existing High Performance Liquid Chromatography (HPLC) method in the literature using t- and F-tests.