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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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Céspedes, Francisco
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2016Characterization protocol to improve the electroanalytical response of graphene-polymer nanocomposite sensorscitations
- 2016Highly sensitive electrochemical immunosensor for IgG detection based on optimized rigid biocompositescitations
- 2016Amperometric thyroxine sensor using a nanocomposite based on graphene modified with gold nanoparticles carrying a thiolated β-cyclodextrincitations
- 2016Intermatrix Synthesis as a rapid, inexpensive and reproducible methodology for the in situ functionalization of nanostructured surfaces with quantum dotscitations
- 2016CdS quantum dots as a scattering nanomaterial of carbon nanotubes in polymeric nanocomposite sensors for microelectrode array behaviorcitations
- 2016Intermatrix synthesis of Ag, AgAu and Au nanoparticles by the galvanic replacement strategy for bactericidal and electrocatalytically active nanocompositescitations
- 2015Modified multiwalled carbon nanotube/epoxy amperometric nanocomposite sensors with CuO nanoparticles for electrocatalytic detection of free chlorinecitations
- 2015Improvement of the detection limit for biosensors: Advances on the optimization of biocomposite compositioncitations
- 2015Effect of carbon nanotubes purification on electroanalytical response of near-percolation amperometric nanocomposite sensorscitations
- 2014Towards to the improvement of the analytical response in voltammetric sensors based on rigid compositescitations
- 2014Simple green routes for the customized preparation of sensitive carbon nanotubes/epoxy nanocomposite electrodes with functional metal nanoparticlescitations
- 2012Determination of total polyphenol index in wines employing a voltammetric electronic tonguecitations
- 2011A new amperometric bienzymatic biosensor based on biocomposites for the determination of gluconic acid in winescitations
- 2009Novel amperometric sensor based on rigid near-percolation compositecitations
- 2009Resolution of heavy metal mixtures from highly overlapped ASV voltammograms employing a wavelet neural networkcitations
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article
Determination of total polyphenol index in wines employing a voltammetric electronic tongue
Abstract
This work reports the application of a voltammetric electronic tongue system (ET) made from an array of modified graphite-epoxy composites plus a gold microelectrode in the qualitative and quantitative analysis of polyphenols found in wine. Wine samples were analyzed using cyclic voltammetry without any sample pretreatment. The obtained responses were preprocessed employing discrete wavelet transform (DWT) in order to compress and extract significant features from the voltammetric signals, and the obtained approximation coefficients fed a multivariate calibration method (artificial neural network-ANN-or partial least squares-PLS-) which accomplished the quantification of total polyphenol content. External test subset samples results were compared with the ones obtained with the Folin-Ciocalteu (FC) method and UV absorbance polyphenol index (I 280 ) as reference values, with highly significant correlation coefficients of 0.979 and 0.963 in the range from 50 to 2400mgL -1 gallic acid equivalents, respectively. In a separate experiment, qualitative discrimination of different polyphenols found in wine was also assessed by principal component analysis (PCA). © 2012 Elsevier B.V.