Journal
ELECTROANALYSIS
Volume 24, Issue 11, Pages 2176-2185Publisher
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
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Funding
- 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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