Affiliation: | 1. Group of Sensors and Biosensors, Department of Chemistry, Unit of Analytical Chemistry, Autonomous University of Barcelona, Edifici Cn, 08193 Barcelona, Spain tel: 34935812149;2. fax: 0034935812379;3. Adasa Sistemas S.A, Pedrosa B, 30. L'Hospitalet de Llobregat, 08909 Barcelona, Spain |