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Three-electrode electrochemical sensor characterization
Koporec, Lukáš ; Prášek, Jan (referee) ; Majzlíková, Petra (advisor)
This bachelor thesis is focused on the thick-film three-electrode electrochemical sensor characterization. In the theoretical part, the thesis describes thick-film technology, standard electrodes used in electrochemistry to detect substances as well as electroanalytical methods for solutions analysis. The experimental part is dedicated to the procedures used in the characterization of the three-electrode electrochemical sensor and their evaluation.
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Study of electrochemical behaviour of quinine and cinchonidine at boron doped diamond electrode
Brunovská, Veronika ; Schwarzová, Karolina (advisor) ; Nesměrák, Karel (referee)
In this thesis, it was for the first time studied the electrochemical behaviour of cinchona alkaloids quinine and cinchonidine by cyclic voltammetry and differential pulse voltammetry using boron doped diamond (BDD) thin film as an electrode material. Cyclic voltammograms did not exhibit any significant anodic signals corresponding to a simple electrode reaction. However, current increase with indistinctive maxima compared to the basic electrolyte was recorded in Britton - Robinson buffers with pH 2,0 − 12,0 medium. Accordingly, insignificant signals observable in the cathodic area at far negative potential close to the potential of decomposition of the supporting electrolyte , presumably to the reduction of quinoline skeleton. It was found by means of differential pulse voltammetry that the number of those observable current maxima varies for quinine and cinchonidine in different supporting electrolytes. Quinine provided the best developed anodic peaks in the medium of BR buffer pH 5,0 and 6,0 and cinchonidine in pH 7,0, 9,0 and 12,0. The calibration dependence of anodic peak of quinine in BR buffer pH 5,0 is linear in the concentration range 6∙10−6 mol∙l−1 − 1∙10−4 mol∙l−1 with limit of quantitation 4,39∙10−6 mol∙l−1 . In the cathodic area the limit of quantitation is 4,33∙10−5 mol∙l-1 . The...
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Three-electrode electrochemical sensor characterization
Koporec, Lukáš ; Prášek, Jan (referee) ; Majzlíková, Petra (advisor)
This bachelor thesis is focused on the thick-film three-electrode electrochemical sensor characterization. In the theoretical part, the thesis describes thick-film technology, standard electrodes used in electrochemistry to detect substances as well as electroanalytical methods for solutions analysis. The experimental part is dedicated to the procedures used in the characterization of the three-electrode electrochemical sensor and their evaluation.
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