| Title |
Electrochemical mercury biosensor based on electrocatalytic properties of Prussian blue and inhibition of catalase |
| Authors |
Virbickas, Povilas ; Dėnas, Narvydas ; Valiūnienė, Aušra |
| DOI |
10.3390/chemosensors11050311 |
| Full Text |
|
| Is Part of |
Chemosensors.. Basel : MDPI. 2023, vol. 11, iss. 5, art. no. 311, p. [1-13].. eISSN 2227-9040 |
| Keywords [eng] |
biosensor ; catalase ; chronoamperometry ; electrochemical impedance spectroscopy ; mercury ion ; Prussian blue |
| Abstract [eng] |
This paper presents a detailed study of a novel type of electrochemical mercury ion (Hg2+) biosensor developed by combining Prussian blue (PB) and catalase (Cat). The simultaneous PB-catalyzed reduction of hydrogen peroxide and the inhibition of catalase by Hg2+ ions were used as the working principle of the biosensor. The biosensor described in this research was capable of detecting Hg2+ ions at relatively low potentials (+0.2 V vs. Ag|AgCl, KClsat) using chronoamperometry and a fast Fourier transform electrochemical impedance spectroscopy (FFT-EIS). Linear ranges of 0.07 mM–3 mM and 0.13 mM–0.80 mM of Hg2+ ions were obtained using amperometric and impedimetric techniques, respectively. In the course of this work, an amperometric study of the Hg2+ ion biosensor was also carried out on a real sample (tap water containing Hg2+ ions). |
| Published |
Basel : MDPI |
| Type |
Journal article |
| Language |
English |
| Publication date |
2023 |
| CC license |
|
