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An electrochemical immunosensor for the simultaneous determination of ghrelin (GHRL) and peptide YY (PYY) using dual screen-printed carbon electrodes modified with reduced graphene oxide (rGO) is presented. Diazonium salt of 4-aminobenzoic acid (4-ABA) was electrochemically grafted on the modified electrodes allowing covalent immobilization of antibodies. After competitive immunoassays using alkaline...
The first amperometric immunosensor for the quantification of TGF–β1 is described in this work. The immunosensor design involves disposable devices using carboxylic acid–functionalized magnetic microparticles supported onto screen–printed carbon electrodes and covalent immobilization of the specific antibody for TGF–β1 using Mix&GoTM polymer. A sandwich–type immunoassay was performed using peroxidase–labeled...
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