KINETIC DETERMINATION OF ORGANIC VAPOR MIXTURES WITH SINGLE PIEZOELECTRIC QUARTZ-CRYSTAL SENSOR USING ARTIFICIAL NEURAL NETWORKS AND PARTIAL LEAST-SQUARES

A single piezoelectric quartz crystal coated with one kind of crown et her was applied to the simultaneous determination of acid and amine va por mixtures. From the adsorption and desorption curves of analytes, w hich had somewhat differences in shape, frequency shifts from ten time windows were taken as inputs for two chemometric methods, partial lea st squares (PLS) and artificial neural networks (ANN). The results sho wed that the prediction was better for artificial neural networks in b oth sample sets.