Electrochemiluminescence assay, especially for biological substances, with long measurement period

摘要

Detection of an analyte in a sample is performed using a label comprising a metal complex containing at least one charge carrier and/or at least one hydrophilic group. Detecting an analyte in a sample by electrochemiluminescence comprises using a label comprising a metal complex containing at least one charge carrier and/or at least one hydrophilic group and measuring the electrochemiluminescence for at least 0.5 seconds. An Independent claim is also included for detecting an analyte in a sample by electrochemiluminescence, comprising: (a) providing an electrochemiluminescence device comprising a measuring electrode; (b) contacting the electrode with a conditioning fluid containing an electrochemiluminescence co-substrate; (c) adjusting the conditions at the electrode so that activated co-substrate molecules are generated on and/or in the interfacial region of the electrode; (d) contacting the electrode with a sample containing an electrochemiluminescence co-substrate and a label comprising a metal complex containing at least one charge carrier and/or at least one hydrophilic group; (e) applying an electrochemiluminescence-inducing potential to the electrode and measuring the electrochemiluminescence; and (f) correlating the measured luminescence with the presence or amount of the analyte in the sample.