BIOSENSOR SYSTEM

摘要

Biosensor system and method for the electrochemical determination of an analyte in a sample. An analyte reactant is mixed with the sample to form a reaction liquid which is contacted to electrodes for measurement of an analyte detection current. The analyte detection current is characteristic of the analyte concentration in the sample by virtue of a reaction sequence comprising an analyte specific reaction taking place in the reaction liquid and an electrode reaction including transfer of electrons through an electrode surface. A plurality of values of a curve of the analyte detection current versus time is measured and the analyte concentration is derived therefrom by means of an evaluation algorithm. Fast results of high accuracy are achieved in that the DC-voltage is applied to the electrodes during the analyte-specific reaction whereby the analyte-specific reaction and the electrode reaction take place simultaneously resulting in an analyte detection current versus time curve which comprises a section in which the current rises versus time and the analyte detection current is measured at at least two points of time in the rising section and the values of the analyte detection current resulting from said at least two measurements are used in the evaluation algorithm for temperature error compensation.