National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
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 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.
Voltammetric Determination Phenylglyoxylic Acid in Urine Using Graphite Composite Electrode
Navrátil, Tomáš ; Šenholdová, Z. ; Shanmugam, K. ; Barek, J. ; 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. In the article are compared the results of analysis of the certified material (urine), achieved on the mercury and on the carbon composite electrodes.

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