title: Supported liquid membrane-modified piezoelectric flow sensor with molecularly imprinted polymer for the determination of vanillin in food samples.
abstract: An on-line supported liquid membrane-piezoelectric detection system, based on a molecularly imprinted polymer (SLM-QCM-MIP) manifold, has been developed and applied to the quantitative determination of vanillin in food samples. The analyte is extracted from a donor phase into the hydrophobic membrane, and then back extracted into a second aqueous phase used as the acceptor solution. The quantification of vanillin was performed using a quartz crystal microbalance modified with a molecularly imprinted polymer (MIP). The method shows a linear range between 5 and 65muM, with a relative standard deviation of +/-4.8% (at 5muM). The method was validated by analysing food samples and comparing the results with an SLM based on spectrophotometric quantification.
authors.affiliation: Department of Analytical Chemistry and Food Technology, University of Castilla-La Mancha, Campus de Ciudad Real, E-13004 Ciudad Real, Spain.
authors.forename: Mónica
authors.initials: M
authors.lastname: Avila
authors.forename: Mohammed
authors.initials: M
authors.lastname: Zougagh
authors.forename: Alberto
authors.initials: A
authors.lastname: Escarpa
authors.forename: Angel
authors.initials: A
authors.lastname: Ríos