Immunosensors for atrazine detection in red wine samples
| Autor: | Valera Cano, Enrique Andrés, Rodríguez Martínez, Ángel, Azcón, J.R., Sánchez Baeza, Francisco J., Marco Colas, María Pilar |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya. MNT - Grup de Recerca en Micro i Nanotecnologies |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Enginyeria química::Química agrícola::Plaguicides [Àrees temàtiques de la UPC]
Enginyeria agroalimentària::Agricultura::Viticultura [Àrees temàtiques de la UPC] Herbicides -- Detecció Atrazina Vi i vinificació -- Anàlisi Impedance spectroscopy Atrazine -- Detection Interdigitated μ-electrodes Food safety |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya instname |
| Popis: | Two novel immunosensors, one impedimetric and other one conductimetric, for atrazine detection in red wine samples have been developed. Impedimetric immunosensor is based on an array of interdigitated μ- electrodes (IDμEs) and bioreagents specifically developed to detect this pesticide. Conductimetric immunosensor incorporates additionally gold nanoparticles. Bioreagents were covalently immobilized on the surface of the electrodes (interdigital space). In both cases the biochemical determination of atrazine is possible without any redox mediator. For the case of the impedimetric immunosensor, the detection method is based on impedimetric measurements (in a wide range of frequencies), whereas in the case of the conductimetric immunosensor the detection method is based on conductimetric measurements (DC measurements).The potential of the impedimetric immunosensor to analyze atrazine in complex sample matrices, such as red wine, have been evaluated. This immunosensor can detect atrazine with limits of detection in the order sub-ppb, far below the maximum residue level (MRL) (50 μg L−1) established by European Union (EU) for residues of this herbicide in the wine grapes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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