title: Bismuth film electrode at a silver solid amalgam substrate as a new tool for voltammetric determination of electrochemically reducible organic compounds.
abstract: New type of bismuth film electrode prepared by electrodeposition of bismuth film on a silver solid amalgam substrate (BiF-AgSAE) was tested as a sensor for voltammetric determination of electrochemically reducible organic substances using 2-amino-6-nitrobenzothiazole (ANBT) as a model analyte. Using the optimized conditions (a 9:1 (v/v) mixture of aqueous Britton-Robinson buffer solution (pH 10.0) and methanol), the limits of quantification are 0.16 μmol L(-1) for direct current voltammetry (DCV) and 0.22 μmol L(-1) for differential pulse voltammetry (DPV). The obtained calibration dependences are linear in the concentration range from 0.2 to 100 μmol L(-1) and the practical applicability of the newly developed electrode for the direct determination of ANBT in tap and mineral water model samples was confirmed in the concentration range from 0.2 to 10 μmol L(-1).
authors.affiliation: Charles University in Prague, Faculty of Science, Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Hlavova 2030/8, 128 43 Prague 2, Czech Republic.
authors.forename: Dana
authors.initials: D
authors.lastname: Deýlová
authors.forename: Vlastimil
authors.initials: V
authors.lastname: Vyskočil
authors.forename: Jiří
authors.initials: J
authors.lastname: Barek
authors.forename: Anastasios
authors.initials: A
authors.lastname: Economou
mesh_terms: D052160:Benzothiazoles / Q000032:analysis*; D001729:Bismuth / Q000737:chemistry*; D004563:Electrochemistry; D004566:Electrodes; D009153:Mutagens / Q000032:analysis*; D010084:Oxidation-Reduction; D012834:Silver / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D052160:Benzothiazoles; D009153:Mutagens; D014874:Water Pollutants, Chemical; D012834:Silver; D001729:Bismuth