Digitální knihovnaUPCE
 

8/2013-14 Sensing in Electroanalysis

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

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20143

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Předmět: search.filters.subject.carbon paste electrodes

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  • Náhled
    Článekpeer-reviewedpublishedOtevřený přístup
    The effect of acetate buffer concentration on the anodic stripping voltammetric response of carbon paste (macro)electrodes and microelectrodes
    (Univerzita Pardubice, 2014) Agrafiotou, Panagiota; Soukupová, Lucie; Švancara, Ivan; Sotiropoulos, Sotiris
    The Square Wave Anodic Stripping Voltammetry response of in situ deposited Bi-film conventional size Carbon Paste Electrodes (CPEs) and generic microdisc carbon paste microelectrodes (CPμEs) in Pb(II) and Cd(II) solutions, has been studied as a function of acetate buffer concentration in the extended 0.001 M -0.5 M range. The advantages of microelectrodes (high ohmic tolerance and high mass transfer rates) allowed for the recording of good quality voltammograms at the CPμEs even at the lowest 0.001 M acetate levels studied, resulted in relatively higher voltammetric peaks and gave an optimum Pb and Cd signal in the 0.01-0.02 M acetate range.
  • Náhled
    Článekpeer-reviewedpublishedOtevřený přístup
    Non-traditional electrode materials for detection of biomarkers
    (Univerzita Pardubice, 2014) Barek, Jiří; Moreira, Josino C.; Wang, Joseph
    In this paper, new electrochemical methods suitable for detection of various types of biomarkers (biomarkers of exposition, tumor biomarkers, and biomarkers of medical treatment) are briefly reviewed. Attention is paid to the use of non-traditional electrode materials (various forms of amalgam electrodes, boron doped diamond film electrodes, carbon paste and carbon film electrodes, etc.) for voltammetric (batch analysis) and amperometric (flowing systems) detection of above mentioned biomarkers.
  • Náhled
    Článekpeer-reviewedpublishedOtevřený přístup
    Electrodes modified with bismuth, antimony and tin precursor compounds for electrochemical stripping analysis of trace metals (a short review)
    (Univerzita Pardubice, 2014) Lezi, Nikolitsa; Economou, Anastasios; Barek, Jiří
    Over the last decade, intensive research is being carried out towards the development of “green” electrochemical sensors. Bismuth, antimony and tin electrodes have been proposed as potential substitutes of mercury electrodes in electrochemical stripping analysis of trace metals. The main advantage of these metals as electrode materials is their lower toxicity compared to mercury. Among the different configuration of bismuth, antimony and tin electrodes, one of the most attractive involves the modification of a support material with a bismuth, antimony or tin precursor compound (oxide, hydroxide or sparingly soluble salt). When the electrode is polarized to a sufficiently cathodic potential, the metal precursor is reduced to the respective metal which forms a thin “film” on the surface of the support material. The present article is an overview of the existing state–of–the–art in the field of bismuth, antimony and tin precursor–modified sensors. This review covers and critically discusses the various fabrication approaches (support materials, types of precursor compounds, modification approaches, precursor reduction methods) and also lists typical applications of these precursor–modified sensors to electrochemical stripping analysis of metals.