2009
DOI: 10.1016/j.talanta.2008.12.058
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A piezoelectric immunosensor for the determination of pesticide residues and metabolites in fruit juices

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Cited by 116 publications
(81 citation statements)
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References 34 publications
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“…Depending on the immobilized molecule, two main solid-phase immunoassay formats can be defined: the conjugate-coated; and the antibody-coated formats. With low-molecular weight compounds, the conjugate coated format (when the immobilized immunoreagent is the hapten-protein conjugate) must preferably be chosen (Montoya et al, 2008;March et al, 2009). In this type of assay, the detection of the analyte is based on a binding inhibition test and thus a competitive assay is performed; the free analyte competes with the immobilized conjugate for binding to a fixed, limited amount of the antibody.…”
Section: Piezoelectric Immunosensors For Low Molecular Weight Pollutantsmentioning
confidence: 99%
See 1 more Smart Citation
“…Depending on the immobilized molecule, two main solid-phase immunoassay formats can be defined: the conjugate-coated; and the antibody-coated formats. With low-molecular weight compounds, the conjugate coated format (when the immobilized immunoreagent is the hapten-protein conjugate) must preferably be chosen (Montoya et al, 2008;March et al, 2009). In this type of assay, the detection of the analyte is based on a binding inhibition test and thus a competitive assay is performed; the free analyte competes with the immobilized conjugate for binding to a fixed, limited amount of the antibody.…”
Section: Piezoelectric Immunosensors For Low Molecular Weight Pollutantsmentioning
confidence: 99%
“…The covalent binding of a protein to a gold surface by means of SAM formation, basically consists on the following stages: (1) SAM formation with an ethanolic solution of a long chain thiolated acid which is adsorbed onto the gold sensor surface; (2) activation of the terminal carboxylic groups of the thiolated acid, to an intermediate reagent (N-hydroxysuccinimide ester), which takes place by means of an ethanolic or aqueous mixture of Nhydroxi-succinimide (NHS) and carboxi-diimide (EDC); (3) covalent attachment of the active intermediate, thus obtained, to the amine groups of the hapten-protein conjugates; and (4) addition of ethanolamine to deactivate all the unreacted intermediate NHS-esters remaining on the sensor surface. This procedure ensures that only covalently bound analyte derivatives (hapten-conjugates) remain on the sensor surface (Duan & Meyerhoff, 1995;Disley et al, 1998;Mauriz et al, 2006;Briand et al, 2006;March et al, 2009). The process described can be done with simple or mixed SAMs.…”
Section: Immunoreagent Immobilizationmentioning
confidence: 99%
“…Os resíduos de carbaril em amostras ambientais são geralmente determinados por técnicas cromatográficas [13][14][15][16][17] que incluem complicados pré-tratamentos ou clean-up das matrizes. Uma alternativa para essas análises são as técnicas eletroanalíticas empregando, por exemplo, eletrodos modificados [18][19][20][21][22] e DDB. 8,23 Esse material eletródico [24][25][26][27][28] apresenta ampla janela eletroquímica devida à pouca reatividade química da superfície do diamante, grande resistência a vários meios agressivos, baixas correntes capacitivas e robustez mecânica, que o caracteriza como um material ideal para experimentos sonoeletroquímicos.…”
Section: Introductionunclassified
“…El pesticida Carbaryl, es un insecticida de amplio espectro perteneciente al grupo de los N-metilcarbamatos, que junto con los pertenecientes a la familia de los organofosforados inhiben la acción de la acetilcolinesterasa [Abad 1995] Se obtuvieron curvas patrón de calibración, siguiendo los protocolos de trabajo y reactivos descritos por grupo de Inmunotecnología del i3BH-UPV [March et al 2009e;Montoya et al 2008].…”
Section: Inmunoensayosunclassified
“…Los Resultados obtenidos se pueden comparar con trabajos previos del grupo [March et al 2009d], que han usado el mismo tipo de ensayo, los mismos reactivos, pero, utilizando en ese caso el Maxtek-RQCM como instrumento de caracterización y haciendo todo los ensayos a temperatura ambiente.…”
Section: Inmunosensorunclassified