Publication detail

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

RICHTERA, L. NGUYEN, H. HYNEK, D. KUDR, J. ADAM, V.

Original Title

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

Type

journal article in Web of Science

Language

English

Original Abstract

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 μM) in the case of Cr(III) determination and 75 times (from 9.000 to 0.120 μM) 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 +, SO4 2−, 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

Keywords

electrochemical speciation, CR(III), carbon electrode, electron microscopy, elemental mapping, spectroscopy

Authors

RICHTERA, L.; NGUYEN, H.; HYNEK, D.; KUDR, J.; ADAM, V.

Released

1. 8. 2016

ISBN

0003-2654

Periodical

ANALYST

Year of study

141

Number

19

State

United Kingdom of Great Britain and Northern Ireland

Pages from

5577

Pages to

5585

Pages count

9

BibTex

@article{BUT131487,
  author="Lukáš {Richtera} and Hoai Viet {Nguyen} and David {Hynek} and Jiří {Kudr} and Vojtěch {Adam}",
  title="Electrochemical speciation analysis for simultaneous determination of Cr(III) and Cr(VI) using an activated glassy carbon electrode",
  journal="ANALYST",
  year="2016",
  volume="141",
  number="19",
  pages="5577--5585",
  doi="10.1039/c6an00983b",
  issn="0003-2654"
}