The present invention relates to an optical apparatus and a uniaxial method for rapidly measuring spectroscopically labelled specific binding analytes in a reaction assay mixture that contains unbound label without requiring the physical separation of the unbound label from the reaction mixture or sequential...http://www.google.de/patents/US5242837?utm_source=gb-gplus-sharePatent US5242837 - Method for the rapid detection of analytes involving specific binding reactions and the use of light attenuating magnetic particles
