Digitální knihovnaUPCE
 

8/2013-14 Sensing in Electroanalysis

Permanentní URI k tomuto záznamuhttps://hdl.handle.net/10195/56677

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20142

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Autor: search.filters.author.Fischer, Jan

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Nyní se zobrazuje 1 - 2 z 2
  • Náhled
    Článekpeer-reviewedpublishedOtevřený přístup
    Voltammetric determination of Diazepam at meniscus-modified silver solid amalgam electrode
    (Univerzita Pardubice, 2014) Samiec, Petr; Fischer, Jan; Navrátilová, Zuzana
    Voltammetric methods for determination of Diazepam (DZ) were developed. Techniques differential pulse voltammetry and DC voltammetry were used for determination of DZ at meniscus-modified silver solid amalgam electrode (m-AgSAE). The effect of the pH on the intensity of signal of DZ was studied in a mixture of Britton-Robinson buffer + methanol (9:1) and 0.1 M NaOH + methanol (9:1); the optimal medium for analysis was a mixture of 0.1 M NaOH + methanol (9:1). The developed method has been tested on the determination of DZ in a sample of commercial drug (Diazepam).
  • Náhled
    Článekpeer-reviewedpublishedOtevřený přístup
    Voltammetric and amperometric determination of biologically active organic compounds using various types of silver amalgam electrodes
    (Univerzita Pardubice, 2014) Barek, Jiří; Fischer, Jan; Moreira, Josino C.; Wang, Joseph
    In this paper, possibilities of various types of silver amalgam electrodes for determination of micromolar and submicromolar concentrations of various electrochemically reducible biologically active organic compounds are reviewed. Attention is paid to the use of polished and mercury meniscus modified silver solid amalgam electrodes, silver amalgam paste electrodes both with and without pasting liquids, single crystal silver amalgam electrodes, composite silver amalgam electrodes, and porous silver amalgam electrodes. Main focus is on voltammetric application of above mentioned electrodes. However, their application in flowing systems (high performance liquid chromatography and flow injection analysis with electrochemical detection) is briefly discussed as well. The compatibility of various types of silver amalgam electrodes with preliminary separation based on solid phase extraction is demonstrated on determination of nanomolar concentrations of environmentally important compounds in model samples of drinking and river waters.