Electrochemical behaviour of persulphate on carbon paste electrodes modified with Prussian blue and analogous compounds

Autor:	Kurt Kalcher, W. Ng, M. Weißenbacher, Herbert Greschonig, Wing Hong Chan, Anastasios Voulgaropoulos
Rok vydání:	1992
Předmět:	Detection limit chemistry.chemical_compound Prussian blue chemistry Supporting electrolyte Inorganic chemistry Chemical modification Amberlite Hydrogen peroxide Electrochemistry Biochemistry Voltammetry Analytical Chemistry
Zdroj:	Fresenius' Journal of Analytical Chemistry. 344:87-92
ISSN:	1618-2650 0937-0633
Popis:	Peroxodisulphate (“persulphate”) may be determined by direct current voltammetry (DCV) using carbon paste electrodes chemically modified with Prussian Blue, iron(III)-hexacyanoruthenate(II) or iron(III)-hexacyano-osmate(II). The determination is based on the exploitation of catalytic currents from the reduction of the modifiers. Best results are obtained for iron(III)-hexacyanoosmate(II) yielding a detection limit of 1 μg O22−/ml (as persulphate) when using HCl (10−2 mol/l) as supporting electrolyte and measuring in the DCV-mode. Electrodes doubly-modified with the osmium compound and a liquid anion-exchanger (Amberlite LA2) allow determinations of persulphate after preconcentration under open circuit conditions, in the presence of hydrogen peroxide and perborate, with a detection limit of 20 ng O22−/ml (as persulphate).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::69796198687a2e0e1b2e34645a970ca7 https://doi.org/10.1007/bf00325120 Zobrazit plný text záznamu Full text from SpringerLink