title: Automated electronic tongue based on potentiometric sensors for the determination of a trinary anionic surfactant mixture.
abstract: An automated electronic tongue consisting of an array of potentiometric sensors and an artificial neural network (ANN) has been developed to resolve mixtures of anionic surfactants. The sensor array was formed by five different flow-through sensors for anionic surfactants, based on poly(vinyl chloride) membranes having cross-sensitivity features. Feedforward multilayer neural networks were used to predict surfactant concentrations. As a great amount of information is required for the correct modelling of the sensors response, a sequential injection analysis (SIA) system was used to automatically provide it. Dodecylsulfate (DS(-)), dodecylbenzenesulfonate (DBS(-)) and alpha-alkene sulfonate (ALF(-)) formed the three-analyte study case resolved in this work. Their concentrations varied from 0.2 to 4mM for ALF(-) and DBS(-) and from 0.2 to 5mM for DS(-). Good prediction ability was obtained with correlation coefficients better than 0.933 when the obtained values were compared with those expected for a set of 16 external test samples not used for training.
authors.affiliation: Sensors and Biosensors Group, Department of Chemistry, Autonomous University of Barcelona, Edifici Cn, 08193 Bellaterra, Spain.
authors.forename: Montserrat
authors.initials: M
authors.lastname: Cortina
authors.forename: Christina
authors.initials: C
authors.lastname: Ecker
authors.forename: Daniel
authors.initials: D
authors.lastname: Calvo
authors.forename: Manuel
authors.initials: M
authors.lastname: del Valle
mesh_terms: D000838:Anions; D001331:Automation; D011199:Potentiometry / Q000295:instrumentation*; D013501:Surface-Active Agents / Q000032:analysis*
chemical_list: D000838:Anions; D013501:Surface-Active Agents