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Sol‐Gel Derived Potentiometric Sensor for Determination of Vanadyl Ions
Author(s) -
Arvand Majid,
Moghimi Majid,
Bagherinia Mohammad A.
Publication year - 2007
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200704015
Subject(s) - potentiometric titration , electrode , detection limit , chemistry , glass electrode , inorganic chemistry , ion , ion selective electrode , analytical chemistry (journal) , metal ions in aqueous solution , alkali metal , potentiometric sensor , aqueous solution , reference electrode , selectivity , electrochemistry , chromatography , catalysis , biochemistry , organic chemistry
A sol‐gel electrode, based on thiacalix[4]arene as a neutral carrier, was successfully developed for the detection of VO 2+ in aqueous solutions. The sol‐gel electrode exhibited linear response with Nernstian slope of 29.3±0.3 mV per decade, within the vanadyl ion concentration ranges 1.0×10 −6 – 1.0×10 −1 mol dm −3 . The sol‐gel electrode shows detection limit of 4.9×10 −7 mol dm −3 . The influence of membrane composition, the pH of the test solution, and the interfering ions on the electrode performance were investigated. The electrode exhibited good selectivities for a number of alkali, alkaline earth, transition and heavy metal ions. The effect of temperature on the electrode response showed that the temperature higher than 60 °C deteriorates the electrode performance. Application of the electrode for the determination of vanadyl in spiked samples is reported.