The Mathematical Model for Thiabendazole Electrochemical Determination in Pharmaceutical Formulations, Biological Liquids and Food Products Volodymyr V. Tkach, Tetiana V. Morozova, Oksana O. Hlukhonets, Halyna V. Khorkova, Marta V. Kushnir, et al. Letters in Applied Nanobioscience, 2026 In this work, the electrochemical determination of thiabendazole in pharmaceutical formulations, biological liquids, and food has been described using a mathematical model, which was thereby analyzed using linear stability theory and bifurcation analysis. Three scenarios, including N-oxidation, S-oxidation, and electropolymerization, have been included in the model. The model analysis shows that, despite the presence of the electropolymerization scenario and the increase in the probability of oscillatory behavior, the electroanalytical process, performed anodically on copper sulfide nanoparticles, is efficient and may be used for both electrochemical determination and excess removal of thiabendazole. As for poly(thiobendazole), it is suitable for the determination and removal of heavy metal ions.
Dibenzoxazepine Anodic Determination and Removal on CuS Nanoparticles: A Theoretical Insight Volodymyr V. Tkach, Marta V. Kushnir, Sílvio C. de Oliveira, Igor G. Biryuk, Tetyana B. Sykyrytska, et al. Letters in Applied Nanobioscience, 2026 For the first time, the electroanalytical system for the electrochemical determination and removal of dibenzoxazepine chemical warfare agent on CuS-modified anode has been given. Two oxidation scenarios, including the electropolymerization and N-oxidation, are possible for dibenzoxazepine. Either way, both dibenzoxazepine and its N-oxide will be removed from the environment towards the polymer phase. The analysis of the electroanalytical process using linear stability theory and bifurcation analysis confirms that the steady-state stability allows us to use this process for both electroanalytical and electrocatalytic purposes.
