Simultaneous Determination of 4-Chlorophenol and Oxalic Acid Using an Expanded Graphite-Epoxy Composite Electrode

Autor:	Georgeta Burtica, Ciprian Radovan, Plamen Malchev, Ioana Corb, Joop Schoonman, Stephen J. Picken, Aniela Pop, Florica Manea
Rok vydání:	2008
Předmět:	chemistry.chemical_compound chemistry Tap water Fouling Oxalic acid Inorganic chemistry Electrode Electrochemistry Differential pulse voltammetry Chronoamperometry Cyclic voltammetry Analytical Chemistry
Zdroj:	Electroanalysis. 20:1719-1722
ISSN:	1521-4109 1040-0397
Popis:	An expanded graphite-epoxy composite electrode (EG-Epoxy) was employed for the simultaneous determination of 4-chlorophenol (4-CP) and oxalic acid (OA) by using cyclic voltammetry (CV), chronoamperometry (CA), and differential pulse voltammetry (DPV). The results indicated that OA could be determined in the presence of the same concentrations of 4-CP within the concentration range of 0.1 mM to 0.5 mM with a relative standard deviation (RSD) smaller than 5%. Electrode fouling occurred during CA for 4-CP concentrations larger than 0.5 mM. The DPV method was used for the simultaneous determination of 4-CP and OA before and after electrochemical oxidation by chronopotentiometry under galvanostatic conditions (j=0.04 mA cm−2, t=2 h) of a tap water sample spiked with 0.19 mM 4-CP and 0.1 M Na2SO4.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::afb215b3e4b9c994f76113acbc42a98c https://doi.org/10.1002/elan.200804235 Zobrazit plný text záznamu Plný text