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Título

Labeless Immunosensor Assay for Fluoroquinolone Antibiotics Based Upon an AC Impedance Protocol

Autor Garifallou, G. Z.; Tsekenis, G.; Davis, F.; Higson, S. P. J.; Millner, P. A.; Pinacho, Daniel G.; Sánchez Baeza, Francisco J.; Marco, María Pilar; Gibson, T. D.
Palabras clave Fluoroquinolone
Ciprofloxacin
AC impedance
Immunosensor
Polyaniline
Fecha de publicación 4-jun-2007
EditorTaylor & Francis
Citación Analytical Letters 40(7): 1412-1422 (2007)
ResumenThis paper describes the construction of a labeless immunosensor for the antibiotic ciprofloxacin and its interrogation using an AC impedance protocol. Commercial screen-printed carbon electrodes were used as the basis for the sensor. Polyaniline was electrodeposited onto the sensors and then utilized to immobilize a biotinylated antibody for ciprofloxacin using classical avidin-biotin interactions. Electrodes containing the antibodies were exposed to solutions of antigen and interrogated using an AC impedance protocol. The faradaic component of the impedance of the electrodes was found to increase with increasing concentration of antigen. Control samples containing a non-specific IgG antibody were also studied and calibration curves obtained by subtraction of the responses for specific and non-specific antibody-based sensors, thereby eliminating the effects of non-specific adsorption of antigen.
Descripción 11 pages, 6 figures.
Versión del editorhttp://dx.doi.org/10.1080/00032710701327070
URI http://hdl.handle.net/10261/9741
DOI10.1080/00032710701327070
ISSN1532-236X
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