The main objective of this project is the development of a sensor array system for Triclosan detection at low concentrations in a complex aqueous matrixes, following the electronic tongue concept. To fulfill this objective, the following methodology will be used.

a) Preparation and characterization of sensorial nanostructures based on ultrathin

films via deposition of sequential layers obtained by the layerbylayer

(LbL) technique using common polyelectrolytes, dendrimers, nanotubes, functional polymers and biological molecules onto interdigitated electrodes. The LbL technique consists of obtaining nanostructures by alternate adsorption from aqueous solutions of macromolecules of opposite electrical charged molecules onto a solid substrate.

b) Measurement of impedance at different frequencies, impedance spectrum, of the obtained nanostructures when immersed in aqueous complex matrixes with different triclosan concentrations.

c) The characteristics of impedance spectra will be analysed by supervised and unsupervised pattern recognition techniques such as: Principal Component Analysis (PCA), Support Vector Machines (SVMs) and Clustering Analysis (CA).

d) Characterization of residual waters to be used as aqueous complex matrixes for triclosan detection.