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oai:ebyu-rdlopen.rawdatalibrary.net:ebyu/145712026-10-18T20:43:07Zopenairedrivercom_ebyu_10000col_ebyu_10001

Sensitive voltammetric sensor based on polyoxometalate/reduced graphene oxide nanomaterial: Application to the simultaneous determination of l-tyrosine and l-tryptophanYokuş, Özlem AktaşKardaş, FarukAkyildirim, OnurEren, TanjuAtar, NecipYola, Mehmet Lütfil-Tryptophanl-TyrosinePolyoxometalateReduced graphene oxideSensorAmino acidsCarbonChemical detectionCyclic voltammetryDrug productsElectrochemical impedance spectroscopyElectrodesGlass membrane electrodesGrapheneHigh resolution transmission electron microscopyOxidesSensorsTransmission electron microscopyVoltammetryX ray diffractionElectrochemical determinationModified glassy carbon electrodePolyoxometalatesReduced graphene oxidesReduced graphene oxides (RGO)Simultaneous determinationsX ray photoelectron spectroscopyIn this report, a novel voltammetric sensor based on polyoxometalate (H3PW12O40, POM) functionalized reduced graphene oxide (rGO) modified glassy carbon electrode (GCE) was presented for simultaneous determination of l-tyrosine (l-Tyr) and l-tryptophan (l-Trp). The nanocomposites were characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The electrochemical determination of l-Tyr and l-Trp has been studied using square wave voltammetry (SWV) on GCE modified with POM-rGO composite (POM-rGO/GCE). The developed method was also applied successfully for the simultaneous determination of l-Tyr and l-Trp in spiked serum sample and the linearity range of l-Tyr and l-Trp was 1.0 × 10-11 - 1.0 × 10-9 M with the detection limit of 2.0 × 10-12 M. © 2016 Elsevier B.V. All rights reserved.Elsevier B.V.2016Articlehttps://rdlopen.rawdatalibrary.net/r/ebyu/14571https://doi.org/10.1016/j.snb.2016.04.0500925-4005enSensors and Actuators, B: Chemicalinfo:eu-repo/semantics/openAccessinfo:eu-repo/semantics/articlehttps://ebyu-rdlopen.rawdatalibrary.net/tr/items/ebyu/14571