title: Optimalization of Poly(neutral red) Coated-wire Electrode for Determination of Citrate in Soft Drinks.
abstract: This report presents an optimization of potentiometric measurements withcitrate-selective electropolymerized poly(neutral red) electrodes. The optimal backgroundelectrolyte for these measurements is a TRIS buffer with nitrate at pH 8.5. The electrodesdescribed here exhibit stable and reproducible near-Nernstian response to citrates with alow detection limit of 6 × 10-6M. Electrodes polymerized from sulfuric acid andacetonitrile are compared in detail. Simple and sensitive method for quantification ofcitrate in real-life samples by potentiometry with poly(neutral red) electrodes arepresented. Data from potentiometric measurements of citrate are compared with capillaryelectrophoresis.
authors.affiliation: Department of Analytical Chemistry, Institute of Chemical Technology, Technická 5, 166 28 Prague 6 Czech Republic. gabriela.broncova@vscht.cz.
authors.forename: Gabriela
authors.initials: G
authors.lastname: Broncová
authors.affiliation: Department of Analytical Chemistry, Institute of Chemical Technology, Technická 5, 166 28 Prague 6 Czech Republic.
authors.forename: Tatiana V
authors.initials: TV
authors.lastname: Shishkanova
authors.affiliation: Department of Analytical Chemistry, Institute of Chemical Technology, Technická 5, 166 28 Prague 6 Czech Republic.
authors.forename: Martin
authors.initials: M
authors.lastname: Krondak
authors.affiliation: Department of Analytical Chemistry, Institute of Chemical Technology, Technická 5, 166 28 Prague 6 Czech Republic.
authors.forename: Radko
authors.initials: R
authors.lastname: Volf
authors.affiliation: Department of Analytical Chemistry, Institute of Chemical Technology, Technická 5, 166 28 Prague 6 Czech Republic.
authors.forename: Vladimír
authors.initials: V
authors.lastname: Král
keywords: citrate; coated-wire electrode; conductive polymer; poly(neutral red); real-life sample