4.5 Article

A Potentiometric Sensor for Cd2+ Based on Carbon Nanotube Paste Electrode Constructed from Room Temperature Ionic Liquid, Ionophore and Silica Nanoparticles

Journal

ELECTROANALYSIS
Volume 24, Issue 11, Pages 2176-2185

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201200246

Keywords

Potentiometric sensors; Modified carbon paste electrodes; Cadmium(II) determination; Multiwalled carbon nanotubes; Room temperature ionic liquids

Funding

  1. Research Council of Takestan Branch, Islamic Azad University

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A novel and effective potentiometric sensor for the rapid determination of Cd2+ based on carbon paste electrode consisting of the room temperature ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate, multiwalled carbon nanotubes, silica nanoparticles and ionophore was constructed. The prepared composite has a low potential drift, high selectivity and fast response time, which leads to a more stable potential signal. A linear dynamic range of 4.50x10(-9)1.00x10(-1) mol L-1 with a detection limit of 2.00x10(-9) mol L-1 was obtained. The modified electrode was successfully applied to the accurate determination of trace amounts of Cd2+ in environmental and biological samples.

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