Ion exchange voltammetry as a versatile technique for selective determination of target analytes using novel organicploymers and functionalized clay materials

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dc.contributor.authorGanesan, V
dc.date.accessioned2023-03-11T07:45:43Z
dc.date.available2023-03-11T07:45:43Z
dc.date.issued2018
dc.descriptionIon Exchange Voltammetryen_US
dc.description.abstractA voltammetric sensor for both the individual and the simultaneous determination of ascorbic acid (AA), uric acid (UA) and folic acid (FA) is described. It is based on a glassy carbon electrode (GC) that was modified with bentonite (Bt) that was first functionalized with cysteine (Cys) to which gold nanoparticles were linked. The resulting material (referred to as Au-Cys-Bt) and the other materials were characterized by UV-vis spectroscopy, powder X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray analysis and electrochemical methods. The XRD peak positions of bentonite and Cys-functionalized bentonite prove the incorporation of Cys into bentonite. The XPS spectrum of Au-Cys-Bt confirms the interaction of gold nanoparticles with the thiol group of Cys. The modified GC displays high electrocatalytic activity for the oxidation of AA, UA and FA, typically at 0.19, 0.41, and 0.73 V (vs. SCE), respectively. Differential pulse voltammetric data show a linear response that covers the 1 μM to 25 mM concentration range for AA, the 1 to 200 μM concentration range for UA, and two linear ranges for FA, one from 5 to 100 μM and one from 100 μM to 1.5 mM. The sensor was applied to the determination of AA, UA and FA in (spiked) multi-vitamin syrup, bird serum and milk samples.en_US
dc.description.sponsorshipUniversity Grants Commission, New Delhien_US
dc.identifier.urihttp://localhost:8080/xmlui/handle/123456789/91
dc.language.isoen_USen_US
dc.publisherDepartment of Chemistryen_US
dc.relation.ispartofseriesP-01/692;
dc.subjectIon Exchange Voltammetryen_US
dc.subjectFunctionalized Clay Materialsen_US
dc.titleIon exchange voltammetry as a versatile technique for selective determination of target analytes using novel organicploymers and functionalized clay materialsen_US
dc.typeTechnical Reporten_US

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