IMMUNOASSAY USING ELECTROCHEMICAL DETECTION

摘要

This invention relates to the detection of analyte in a sample using an electrochemical sensor that comprises a control sensing element, a detection sensing element and a magnet which selectively attracts magnetic beads to the detection sensing element relative to the control sensing element. The sensing elements produce a signal which is indicative of the amount of enzymatic label at the sensing element. In the presence of analyte in the sample exposed to the sensing elements, an immunocomplex is formed which comprises the analyte, the enzymatic label and a magnetic bead. The immunocomplex is attracted to the detection sensing element by the magnet. An increase in the amount of enzymatic label at the detection sensing element relative to the control sensing element is indicative of the presence or amount of analyte in the sample. Methods, sensors, devices and kits are provided.