Patricia Duato

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Ochratoxin A (OTA) is one of the most important mycotoxin contaminants of foods, particularly cereals and cereal products, with strict low regulatory levels (of ppb) in many countries worldwide. An electrochemical competitive aptamer-based biosensor for OTA is described. Paramagnetic microparticle beads (MBs) were functionalized with an aptamer specific to(More)
We report a direct competitive immunosensor for the rapid determination of ochratoxin A (OTA) in wine samples. Magnetic beads (1 ± 0.5 μm diameter) covered with streptavidin were functionalized with a monoclonal antibody against OTA, and then left to incubate in a solution of tracer (ochratoxin conjugated to the enzyme peroxidase) and a range of OTA(More)
A piezoelectric immunosensor was tested for ochratoxin A (OTA) mycotoxin detection through the immobilization of OTA-bovine serum albumin (OTA-BSA) conjugate on gold-coated quartz crystals (AT-cut/5 MHz). Immunoassays were performed in a flow-injection system through frequency decreases in a quartz-crystal microbalance (QCM) because of a mass increasing(More)
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