| Summary: | Charles University in Prague Faculty of Pharmacy in Hradec Králové Department of Analytical Chemistry Candidate: Lucie Zelená Supervisors: Prof. Maria da Conceição Branco da Silva, Dr. Célia Maria Pinto Gomes Amorim; Department of Analytical chemistry, Faculty of Pharmacy, University of Porto. Prof. RNDr. Petr Solich, CSc; Department of Analytical Chemistry, Faculty of Pharmacy, Charles University in Prague. Title of master's thesis: Development of a new pyruvate-selective electrode for wine control Pyruvate and other organic acids can influence the properties of wines as for example flavor, color, aroma or stability. New fast, low-cost, simple and sensitive methods have been developed for wine quality control. A development of a new selective electrode for potentiometric determination of pyruvate in wine samples was the aim of this work. Sensors based on PVC membrane using 5,10,15,20-Tetraphenyl-21H,23H-porphine manganese (III) chloride as ionophore were under study. Several solvent mediators and lipophilic additives were tested in optimization of response characteristics of sensors. The most interesting response showed membrane with 2-Nitrophenyl phenyl ether as a solvent mediator and Potassium tetrakis(2-chlorophenyl)borate as a lipophilic additive. Sensors with the best characteristics are...
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