Original scientific paper

https://doi.org/10.15255/KUI.2018.020

Influence of pH on Formation of L-histidine and Copper Complex

Mateja Drulak ; Department of Chemistry, University of Osijek, Cara Hadrijana 8A, 31 000 Osijek, Croatia
Anamarija Stanković orcid.org/0000-0001-5090-0435 ; Department of Chemistry, University of Osijek, Cara Hadrijana 8A, 31 000 Osijek, Croatia
Martina Medvidović-Kosanović orcid.org/0000-0002-9887-9169 ; Department of Chemistry, University of Osijek, Cara Hadrijana 8A, 31 000 Osijek, Croatia

Abstract

Formation of L-histidine and copper complex in 1 : 1 ratio in the pH range from pH = 4 to pH = 10 was studied. Experiments were conducted in an electrochemical cell with a working glassy carbon electrode, reference Ag/AgCl electrode and a platinum wire counter electrode. The results have shown that copper and histidine complex is formed in the range from pH = 6 to pH = 10 and that the oxidation potential of metal ion in the complex became more negative with the increase in pH. Oxidation peak current increased until pH = 8, and thereafter decreased, while oxidation peak potential linearly decreased with increase in pH value.


This work is licensed under a Creative Commons Attribution 4.0 International License.

Keywords

copper; cyclic voltammetry; differential pulse voltammetry; L-histidine

Hrčak ID:

207060

URI

https://hrcak.srce.hr/207060

Publication date:

14.12.2018.

Article data in other languages: croatian

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