SUCRALOSE CoO(OH)-ASSISTED ELECTROCHEMICAL DETECTION IN ALKALINE MEDIA. THE THEORETICAL ANALYSIS OF AN INTERESTING POSSIBILITY

The sucralose electrochemical determination, assisted by cobalt (III) oxyhydroxide, has been theoretically evaluated. The mathematical model, describing the electroanalytical process, has been developed. The analysis of the model by linear stability theory and bifurcation analysis has shown that CoO(OH) may be applied as an efficient electrode modifier in the sucralose determination in neutral and lightly alkaline media. The electrochemical response has to be clear and easy to interpret. The oscillatory and monotonic instabilities may occur due to double electric layer influences of the electrochemical process

THE THEORETICAL DESCRIPTION FOR ECOPIPAM ELECTROCHEMICAL DETERMINATION ON A COBALT(III) OXYHYDROXIDE-BASED MATERIAL

The theoretical description for ecopipam electrochemical determination, assisted by cobalt(III) oxyhydroxide has been given. The correspondent mathematical model has been developed and analyzed by means of linear stability theory and bifurcation analysis. It has been shown that, despite of the electrochemical instabilities, more probable to occur than for the similar systems, the cobalt (III) oxyhydroxide is an efficient electrode modifier for ecopipam determination. The electroanalytical process is diffusion-controlled

THE THEORETICAL EVALUATION OF THE HYDROGEN PEROXIDE ELECTROCHEMICAL SENSING, BASED ON CoSn(OH)6

The possibility of the electrochemical execution of hydrogen peroxide sensing on CoSn(OH)6 has been evaluated from the mechanistic theoretical point of view. The correspondent model has been developed and analyzed by means of linear stability theory and bifurcation analysis. It was shown that this material may be an excellent electrode modifier for H2O2 electrochemical detection, and the electrochemical analysis is realized in a plausible way. The electroanalytical process is diffusion-controlled. The oscillatory and the monotonic instabilities in this system are possible, being caused not only by electrochemical factors, but also by those of autocatalytic behavior during H2O2 reductio

The Theoretical Description for a Sucralose Electrochemical Cathodical Determination over a 9-9´-Diacridyl-modified Electrode

A novel electroanalytical process for sucralose determination has been theoretically suggested. Sucralose is immobilized over an acridine derivative 9-9´-diacridyl, yielding a quaternary salt, which is thereby gradually electrochemically reduced to an N-N´-disubstituted acridone derivative. The correspondent mathematical model has been developed and analyzed by means of linear stability theory and bifurcation analysis, and this analysis has shown the high probability of the oscillatory and monotonic instabilities, due to the double electric layer structure changes during all of the stages of the process. Nevertheless, it also confirms the efficiency of 9-9´-diacridyl-modified electrode for sucralose determination in an electroanalytical system, which may be coupled with a fluorescent indicator. DOI:  http://dx.doi.org/10.17807/orbital.v13i3.158

The Mathematical Modeling for CoO(OH) – Poly(5-Amino-1,4-Naphthoquinone) Composite-Based Sensor for 1-Propenesulfenic Acid and Propanethial S-Oxide Detection in Food and Lacrimogenic Compositions

Abstract: The theoretical description for 1-propenesulfenic acid and its isomer propanethial-S-oxide, substances, responsible for leek lacrimogenic activity, has been described theoretically. The process is realized anodically over a poly(naphthoquinone) – CoO(OH) composite. A model has been developed and analyzed using linear stability theory and bifurcation analysis. According to the model analysis, the ionic compound's transformation during the sulfenic acid oxidation may be responsible for the oscillatory and monotonic instability alongside the double electric layer (DEL) influences of the electrochemical stage. Nevertheless, the model's analysis shows that the electroanalytical process is efficient for determining both of the analytes

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