title: A highly selective voltammetric sensor for nanomolar detection of mercury ions using a carbon ionic liquid paste electrode impregnated with novel ion imprinted polymeric nanobeads.
abstract: This work reports the preparation of a voltammetric sensor for selective recognition and sensitive determination of mercury ions using a carbon ionic liquid paste electrode (CILE) impregnated with novel Hg(2+)-ion imprinted polymeric nanobeads (IIP) based on dithizone, as a suitable ligand for complex formation with Hg(2+) ions. The differential pulse anodic stripping voltammetric technique was employed to investigate the performance of the prepared IIP-CILE for determination of hazardous mercury ions. The designed modified electrode revealed linear responses in the ranges of 0.5nM-10nM and 0.08μM-2μM with a limit of detection of 0.1nM (S/N=3). It was found that the peak currents of the modified electrode for Hg(2+) ions were at a maximum value in phosphate buffer of pH4.5. The optimized preconcentration potential and accumulation time were to be -0.9V and 35s, respectively. The applicability of the proposed sensor to mercury determination in waste water samples is reported.
authors.affiliation: Department of Chemistry, Shiraz University, Shiraz, Iran.
authors.forename: Azam
authors.initials: A
authors.lastname: Bahrami
authors.affiliation: Department of Chemistry, Malek Ashtar University of Technology, Tehran, Iran.
authors.forename: Abbas
authors.initials: A
authors.lastname: Besharati-Seidani
authors.affiliation: Department of Chemistry, Shiraz University, Shiraz, Iran.
authors.forename: Abdolkarim
authors.initials: A
authors.lastname: Abbaspour
authors.affiliation: Department of Chemistry, Razi University, Kermanshah, Iran. Electronic address: mshamsipur@yahoo.com.
authors.forename: Mojtaba
authors.initials: M
authors.lastname: Shamsipur
mesh_terms: D004230:Dithizone / Q000737:chemistry; D055664:Electrochemical Techniques / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D052578:Ionic Liquids / Q000737:chemistry; D057230:Limit of Detection; D008628:Mercury / Q000032:analysis*; D054802:Molecular Imprinting; D049329:Nanostructures / Q000737:chemistry*; D062065:Wastewater / Q000032:analysis
chemical_list: D004230:Dithizone; D052578:Ionic Liquids; D008628:Mercury; D062065:Wastewater
keywords: Carbon ionic liquid past electrode; Differential pulse anodic stripping voltammetry; Mercury ion; Nano-sized ion imprinted polymers