| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Górski, Łukasz
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2017Phosphorothioated oligonucleotides as receptor layers in electrochemical detection of uranyl cationcitations
- 2016Electrochemical Determination of Hg2+ Using Electrodes Modified with Peptide Nucleic Acidcitations
- 2015Electrochemical oligonucleotide-based biosensor for the determination of lead ioncitations
- 2013Development of silicon-based electrochemical transducerscitations
- 2013Oligonucleotide-Based Electrochemical Biosensor for Hg2+ Using Methylene Blue as a Redox Indicatorcitations
- 2009Influence of inner transducer properties on EMF response and stability of solid-contact anion-selective membrane electrodes based on metalloporphyrin ionophorescitations
- 2004Polymeric membrane electrodes with enhanced fluoride selectivity using Zr(IV)-porphyrins functioning as neutral carrierscitations
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article
Electrochemical Determination of Hg2+ Using Electrodes Modified with Peptide Nucleic Acid
Abstract
The development of gold disk electrodes modified with single-stranded PNA (peptide nucleic acid) for the determination of Hg2+ is described. PNA is the most useful and popular example of nucleic acid analogues. Due to the presence of glycine units linked via peptide bond instead of sugar-phosphate backbone, its interaction with molecules like proteins or metal ions is possible. The performance of anionic (AQMS) and cationic (MB and RuHex) redox markers for the generation of current signal is compared. It is shown that the use of anionic marker results in a significantly better analytical parameters, as compared to measurements with cationic markers. In the proposed system, the AQMS current difference increases proportionally within the Hg2+ concentration range 0.05 to 10 μmol·L−1, while for higher concentrations, the saturation of PNA layer with Hg2+ is observed. The optimized sensor distinguishes itself with high selectivity toward Hg2+ and lower detection limit of 3.33 nmol·L−1. The interactions between mercury ion and PNA strands were studied using electrochemical impedance spectroscopy (EIS) and spectrophotometry (UV-VIS).