Velkoplošná uhlíková filmová elektroda - jednoduchý senzor pro voltametrické stanovení elektrochemicky redukovatelných organických sloučenin = Large-Surface Carbon Film Electrode - A Simple Sensor for Voltammetric Determination of Electrochemically Reducible Organic Compounds

To chci

A newly developed large-surface carbon film electrode (LS-CFE) based on a microcrystalline natural graphite-polystyrene composite film was used to study the electrochemical behavior of 4-nitrophenol (4-NP) using DC voltammetry (DCV) and differential pulse voltammetry (DPV). Voltammetric behavior of 4-NP was investigated in dependence on the pH of the used Britton-Robinson buffer. As optimum pH values for the voltammetric determination of 4-NP at the LS-CFE in the cathodic potential region, the pH values 6.0 (for DCV) and 7.0 (for DPV) were chosen. The determinations of 4-NP at the LS-CFE (at a concentration of the analyte of 1.10-4 mol.l-1) showed a good repeatability for both voltammetric techniques used (RSD 2.2 % for DCV and 0.4 % for DPV). Under optimum conditions, the calibration dependences of 4-NP were measured in the concentration range from 1 to 100 μmol.l-1, with limits of quantification (LQs) of 2.3 μmol.l-1 and 1.8 μmol.l-1 for DCV and DPV, respectively. The applicability of the newly developed methods for the determination of 4-NP was verified on the model samples of drinking and river water, with LQs in the range from 1 to 2 μmol.l-1. … celý popis

Podrobná bibliografie

Hlavní autor

Hana Šmejkalová

Další autoři

Vlastimil Vyskočil

Typ dokumentu

Články

Fyzický popis

Ilustrace

Publikováno v

Chemické listy. -- ISSN 0009-2770. -- Roč. 108, č. 3 (2014), s. 264-270

Témata

ORGANIC COMPOUNDS

AROMATIC COMPOUNDS

Nitrophenols

ANALYTICAL METHODS

PRODUCT DEVELOPMENT

VOLTAMMETRY

ELECTRODES

CARBON

POLYSTYRENE

Calibration

TESTING

DRINKING WATER

SURFACE WATER

organické sloučeniny

aromatické sloučeniny

nitrofenoly

analytické metody

vývoj výrobku

voltametrie

elektrody

uhlík

polystyrén

kalibrace

testování

pitná voda

povrchové vody

elektrochemické metody > grafit

Popis jednotky

4 fotografie, 6 grafů, 1 tabulka

Bibliografie

Literatura na s. 269-270,