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A novel paste electrode based on a silver solid amalgam and an organic pasting liquid
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SYSNO ASEP 0377572 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název A novel paste electrode based on a silver solid amalgam and an organic pasting liquid Tvůrce(i) Daňhel, A. (CZ)
Josypčuk, Bohdan (UFCH-W) RID, SAI, ORCID
Vyskočil, V. (CZ)
Zima, J. (CZ)
Barek, J. (CZ)Zdroj.dok. Journal of Electroanalytical Chemistry. - : Elsevier - ISSN 1572-6657
Roč. 656, 1-2 (2011), s. 218-222Poč.str. 5 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova voltammetry ; paste electrode ; silver amalgam Vědní obor RIV CG - Elektrochemie CEP LC06063 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy IAA400400806 GA AV ČR - Akademie věd CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000291768300035 DOI https://doi.org/10.1016/j.jelechem.2010.11.010 Anotace The silver solid amalgam fine powder mixed with a proper pasting liquid, firstly introduced in this work, was found to be a new suitable electrode material for sensitive voltammetric determination of electro-chemically reducible organic compounds. The optimal composition of the amalgam (mercury/silver ratio) and the formed paste (i.e., quality and quantity of pasting liquid and its ratio relative to amalgam) was tested by modern voltammetric methods using 4-nitrophenol as a model compound. This new non-toxic electrode material combines the advantages of an easily renewable paste electrode surface solving the problems connected with the passivation of the solid electrodes and of amalgam electrodes providing good mechanical stability, simple handling and preparation, wide potential window in cathodic potential range and sufficient sensitivity. The silver amalgam fine powder prepared in the weight ratio 60/40 (Hg/Ag) mixed with paraffin oil in the weight ratio 20:1 (w/w) was found to be the most convenient for the determination of 4-nitrophenol using differential pulse voltammetry with limit of detection 1 mu mol l(-1) in 0.2 mol l(-1) acetate buffer pH 4.8. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2013
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