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The use of composite graphite electrode for voltammetric determination of phenylglyoxylic acid
Šenholdová, Z. ; Navrátil, Tomáš ; Shanmugam, K. ; Barek, J. ; Žák, J.
A composite electrode prepared from graphite powder and epoxy resin was applied as a working electrode for the determination of phenylglyoxylic acid (one of the metabolites of styrene) in human urine. Cathodic differential pulse stripping voltammetry was used and optimum conditions have been found giving the limit of determination about 5 mg L-1. All results were compared with those obtained using hanging mercury drop electrode. For the confirmation of suggested mechanism of the electrochemical reaction the elimination voltammetry with linear scan was used.

Voltammetric determination of genotoxic compounds using solid amalgam electrodes
Barek, J. ; Čížek, K. ; Fischer, J. ; Navrátil, Tomáš ; Josypčuk, Bohdan
Possibilities of voltammetric determinations of genotoxic organic compounds for environmental purposes were studied. Traditional mercury electrode was replaced by solid amalgam electrodes. It is possible to conclude that the obtained results are comparable with those, obtained on other types of electrodes.

Voltammetric Determination of one of Styrene Metabolites - Phenylglyoxylic Acid - in Urine Using Graphite Composite Electrode
Navrátil, Tomáš ; Shanmugam, K. ; Šenholdová, Z. ; Heyrovský, Michael ; Surovcová, H.
Phenylglyoxylic acid is metabolized in human body from vinylbenzene (styrene) (from which polystyrene is produced). Presented work deals with determination of this metabolite in human urine using carbon composite electrode.