The present invention involves an artificial nose having an array comprising at least a first dye and a second dye in combination and having a distinct spectral response to an analyte. In one embodiment, the first and second dyes are from the group comprising chemoresponsive dyes, and the second dye...http://www.google.de/patents/US7261857?utm_source=gb-gplus-sharePatent US7261857 - Colorimetric artificial nose having an array of dyes and method for artificial olfaction
