title: A High Sensitivity Impedimetric Biosensor Using the Tannin From Quercusmacrolepis as Biorecognition Element for Heavy Metals Detection.
abstract: A new poly(vinylchloride) (PVC) membrane electrode based on tannin from the bark of Quercusmacrolepis (acorn) as the ionophore was prepared and modified onto the surface of a gold electrode. The electrochemical impedance spectroscopy (EIS) technique was used to study the sensitivity of the electrode that was modified with a thin layer of polymeric biomembrane, in order to detect heavy metals ions in solution. The device shows a good sensitivity for Zn(2+), Ni(2+) ions and a little less for Cd(2+). The electrode indicates a good linear response for the three metals over a wide concentration range from 1.0×10(-9) to 1.0×10(-4) M, with a detection limit of 1.0×10(-9) M.
authors.forename: Nawal
authors.initials: N
authors.lastname: Khedimallah
authors.forename: Ali
authors.initials: A
authors.lastname: Zazoua
authors.forename: Amel
authors.initials: A
authors.lastname: Sbartai
authors.forename: Nicole
authors.initials: N
authors.lastname: Jaffrezic-Renault
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D058266:Dielectric Spectroscopy / Q000295:instrumentation*; D004566:Electrodes; D004784:Environmental Monitoring / Q000295:instrumentation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D019216:Metals, Heavy / Q000032:analysis* / Q000737:chemistry; D011143:Polyvinyl Chloride / Q000737:chemistry; D029963:Quercus / Q000737:chemistry*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013634:Tannins / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D019216:Metals, Heavy; D013634:Tannins; D014874:Water Pollutants, Chemical; D011143:Polyvinyl Chloride