Theoretical Description for Omeprazole Cathodical Electrochemical Determination, Assisted by Omeprazole Electrochemical Determination, Assisted by the Composite Poly(1,2,4-triazole) – VO(OH)

Abstract: In this work, we describe theoretically the possibility of omeprazole electrochemical determination, assisted by the composite containing vanadium oxyhydroxide as an active substance and the polymer of 1,2,4-triazolic derivative as a mediator. The omeprazole molecule undergoes a sulfoxide to sulfide reduction process over a trivalent vanadium compound. The vanadium oxyhydroxide, at its turn, may be oxidized to a tetravalent state, represented in two forms. The electroanalytical process behavior will be illustrated by a trivariate equation-set, analysis of which confirms the efficiency of the composite of poly (1,2,4-triazole) with VO(OH). Vanadium (III) oxyhydroxide may be efficiently used for omeprazole detection both in pharmaceutical formulations, food, and biological liquids

The Theoretical Description of Cathodic Deposition of New Conducting Polymer Composite, Assisted by a Perrhenate of a Novel Triazolic Derivative

The theoretical description of a new sandwich-like rhenium-based polymer composite cathodic electrodeposition has been given. The cathodic process is realized by perrhenate-ion electrochemical reduction to rhenium (IV) oxide, acting as an in situ formed oxidant for 3,4-dimethoxypyrrole polymerization.  It is shown that the polymer deposition in this system is realized by more efficient manner than during the direct electropolymerization. The polymer composite has to have a well-developed morphology and enhanced conductivity by sandwich-like structure. The oscillatory behavior, in this case, is also possible, being caused by the DEL influences on both electrochemical and chemical stages of the process. DOI: http://dx.doi.org/10.17807/orbital.v12i2.1193</p

THE THEORETICAL DESCRIPTION OF PRODIGIOSIN ALKALOIDS ELECTROCHEMICAL DETERMINATION ON TRIAZOLIC DERIVATIVES, REINFORCED BY COBALT AND NICKEL OXYHYDROXIDES

The theoretical description of prodigiosin pigment electrochemical determination, assisted by novel triazolic derivatives, reinforced by cobalt and nickel oxyhydroxides, has been described. It was noticed that both cobalt and nickel oxyhydroxides may serve as efficient electrode modifiers of prodigiosin electrochemical determination in neutral and lightly alkaline media. The electroanalytical process is diffusion-controlled. The oscillatory and monotonic instabilities in the system are possible, being caused by DEL influences on the chemical and electrochemical stages

The Theoretical Description for Ag2O2/Squaraine Dye – Metformin Electrochemical Determination

In this work, the electrochemical description for metformin electrochemical determination, assisted by Ag2O2 composite with squaraine dye, is evaluated from the theoretical point of view. Metformin oxidation is realized via assisted electrochemical 1,2,4-triazole formation, followed by its polymerization and N-oxidation. The correspondent mathematical model has been developed and analyzed by means of linear stability theory and bifurcation analysis. It has shown that the neutral and basic media are more efficient for metformin electrochemical determination than acidic media, due to the absence of the influences of non-protonated aminogroupsand, furtherly, pyridinic nitrogen atoms to double electric layer (DEL) ionic force, conductivity and impedance. In these conditions, the electrochemical instabilities are less capable to realize and, therefore, the linear dependence between the analyte concentration and the current of the system will be easier to obtain and maintain, as no side reaction or additional process, capable to compromise the monomer and (or) modifier stability is realized. DOI: http://dx.doi.org/10.17807/orbital.v12i4.1537</p