Influence of the pulsed amperometric detection to the passivation of the working electrode

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F23%3A10472914" target="_blank" >RIV/00216208:11310/23:10472914 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=NXenAapDLW" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=NXenAapDLW</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s00706-023-03089-w" target="_blank" >10.1007/s00706-023-03089-w</a>

Result language
angličtina
Original language name
Influence of the pulsed amperometric detection to the passivation of the working electrode
Original language description
The degree of passivation of the working electrode during the amperometric detection in flow can be strongly diminished by the application of pulsed amperometry, even without the application of specific cleaning pulses. Three different potential programs were tested and compared to the traditional amperometry with continuously applied potential. All three programs suppressed the passivation in different degree, although the observed efficiency depends also on the conditions of the determination, particularly the pH of the electrolyte. Simple switching between the detection potential and zero potential provided the best results; more complex potential programs shower either the lower efficiency or the low measurement frequency. The detection and quantification limit, obtained using this method, reached 5.8 x 10(-6) mol dm(-3) and 1.9 x 10(-5) mol dm(-3), respectively; their relatively high value is caused by the increase of the background current, inevitably caused by the potential changes.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10406 - Analytical chemistry

Project
<a href="/en/project/GA20-03187S" target="_blank" >GA20-03187S: Study of electrochemical and adsorption processes on nanostructured sp2 and sp3 carbon surfaces in relation to their physico-chemical characteristics</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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