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Reference type: Journal
Authors: Shirzadmehr A, Afkhami A, Madrakian T
Article Title: A new nano-composite potentiometric sensor containing an Hg2+ ion imprinted polymer for the trace determination of mercury ions in different matrices.
Publication date: 2015
Journal: Journal of Molecular Liquids
Volume: 204
Page numbers: 227-235.
DOI: 10.1016/j.molliq.2015.01.014
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0167732215000252

Abstract: A novel, simple and very sensitive carbon paste sensor composed of nanomaterials (graphene nanosheets and alumina nanoparticles), an Hg2+ ion imprinted polymer, as a sensing modifier, and an ionic liquid, as the binder, was prepared and used for the potentiometric determination of Hg2+ ions in a wide variety of real samples. For the investigation of the ion-to-electron transducing ability of graphene nanosheets and ionic liquid on the electrode surface, the electrochemical impedance spectroscopy measurements were done. Under the optimized conditions, the suggested nano-composite sensor presented a detection limit of 1.95 x 10-9 mol L-1 and a linear analytical range from 4.00 x 10-9 to 1.30 x 10-3 mol L-1 with an excellent Nernstian slope of 29.72 mV decade-1. The suggested mercury sensor was successfully applied for the highly sensitive determination of trace amounts of Hg2+ in different real samples with satisfactory results
Template and target information: mercury ion, Hg(II)
Author keywords: Hg2+ ion imprinted polymer, Graphene, Alumina nanoparticles, carbon paste electrode, Ionic liquid


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