Electrochemical speciation analysis for simultaneous determination of Cr(III) and Cr(VI) using an activated glassy carbon electrode

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F16%3A43910475" target="_blank" >RIV/62156489:43210/16:43910475 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/16:PU121933

Výsledek na webu

<a href="http://dx.doi.org/10.1039/c6an00983b" target="_blank" >http://dx.doi.org/10.1039/c6an00983b</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c6an00983b" target="_blank" >10.1039/c6an00983b</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electrochemical speciation analysis for simultaneous determination of Cr(III) and Cr(VI) using an activated glassy carbon electrode

Popis výsledku v původním jazyce

In this study, the enhancement of electrochemical signals of Cr(III) and Cr(VI) by using an activated glassy carbon electrode (GCE) measured by differential pulse voltammetry (DPV) is demonstrated. The activated GCE exhibited higher sensitivity for detection of Cr( III) and Cr(VI) compared with the bare GCE. By using the activated GCE, the limit of detection decreased 15.3 times (from 0.230 to 0.015 mu M) in the case of Cr(III) determination and 75 times (from 9.000 to 0.120 mu M) in the case of Cr(VI) determination. Moreover, a simultaneous speciation analysis of Cr( III) and Cr(VI) using the activated GCE was presented. Scanning electron microscopy, elemental mapping, and electrochemical impedance spectroscopy were employed for investigation of the surface of the activated GCE. Finally, the influence of different ions (Na+, K+, NH4+, SO42-, NO3-, and Cl- in the form of Na2SO4, NaNO3, NH4Cl, and KCl salts) on the speciation signals of Cr(III) and Cr(VI) in a mixture of the two Cr oxidation states was investigated.

Název v anglickém jazyce

Electrochemical speciation analysis for simultaneous determination of Cr(III) and Cr(VI) using an activated glassy carbon electrode

Popis výsledku anglicky

In this study, the enhancement of electrochemical signals of Cr(III) and Cr(VI) by using an activated glassy carbon electrode (GCE) measured by differential pulse voltammetry (DPV) is demonstrated. The activated GCE exhibited higher sensitivity for detection of Cr( III) and Cr(VI) compared with the bare GCE. By using the activated GCE, the limit of detection decreased 15.3 times (from 0.230 to 0.015 mu M) in the case of Cr(III) determination and 75 times (from 9.000 to 0.120 mu M) in the case of Cr(VI) determination. Moreover, a simultaneous speciation analysis of Cr( III) and Cr(VI) using the activated GCE was presented. Scanning electron microscopy, elemental mapping, and electrochemical impedance spectroscopy were employed for investigation of the surface of the activated GCE. Finally, the influence of different ions (Na+, K+, NH4+, SO42-, NO3-, and Cl- in the form of Na2SO4, NaNO3, NH4Cl, and KCl salts) on the speciation signals of Cr(III) and Cr(VI) in a mixture of the two Cr oxidation states was investigated.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CG - Elektrochemie

OECD FORD obor

—

Projekt

<a href="/cs/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Analyst

ISSN

0003-2654

e-ISSN

—

Svazek periodika

141

Číslo periodika v rámci svazku

19

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

5577-5585

Kód UT WoS článku

000384309800013

EID výsledku v databázi Scopus

2-s2.0-84988667183