The goal of the present thesis was the development of electrochemical gas sensor for the detection of peroxo species with the help of printed electrode systems. Modification of the working electrode was made by coating the surface with nanostructured sensor materials, mostly from water suspensions. Gel electrolytes based on polyacrylic acid were used, which besides working as electrolytes acted as mediums for the stabilization and preconcentration of hydrogen peroxide and later triacetone triperoxide (TATP) explosive. Cyclic voltammetry was used for the characterisation of the sensor for the detection of hydrogen peroxide in gaseous phase, while pulse amperometry was used for its detection. Key detection parameters were optimised like the concentration of catalytic material, pH of the electrolyte, time of accumulation, potential etc. Then a model organic peroxo explosive TATP was synthesised and successfully detected in gaseous phase by the same sensor. For validation of the method a standard analytical method on the basis of gas chromatography coupled with mass spectrometry (GC-MS) was used.
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