The chemical detection unit is based on a novel concept of biophotonic sensing cells, called BICELLS. These BICELLS will use resonant nanopillars as transducer and monoclonal antibodies as selective bioreceptors to detect toxins, like Okadaic Acid, and man-made pollutants, like the coplanar family of PCBs. Both resonant nanopillars and monoclonal antibodies are going to be developed in WP4, as well as the biofunctionalization of transducer and the analysis protocol. The transducer will be integrated in a multiplexed chip, developed in WP4 as well, with different sensing channels allowing the monitoring of several targets at the same time by means of the development of an optical reader device for multiplexed chip interrogation. A portable device will be developed so that analysis can easily be performed in place.