A method for the detection or quantitation of an analyte in a biological sample is disclosed. The method comprises the steps of selecting a biological sample suspected of containing a target analyte and binding the target analyte in the sample to a binding partner conjugated to an acridinium compound,...http://www.google.de/patents/US7083986?utm_source=gb-gplus-sharePatent US7083986 - Near infrared chemiluminescent acridinium compounds and uses thereof