Disclosed is a testing device and methods for the identification of an analyte of interest in a sample. In a preferred embodiment, the testing device includes a front panel having at least one sample application aperture; a rear panel having at least one solvent application aperture; a sample collection...http://www.google.es/patents/US7704729?utm_source=gb-gplus-sharePatente US7704729 - Apparatus and method for analyte detection
