The use of nanocomposite approach in the construction of carbon paste electrode and its application for the potentiometric determination of iodide

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Aslaner S. I., Ozel A.

MONATSHEFTE FUR CHEMIE, cilt.153, sa.10, ss.881-893, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 153 Sayı: 10
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1007/s00706-022-02973-1
  • Dergi Adı: MONATSHEFTE FUR CHEMIE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core
  • Sayfa Sayıları: ss.881-893
  • Anahtar Kelimeler: Anions, Electrochemistry, Iodide-selective carbon paste electrode, Carbon nanotubes, Metal oxide nanoparticles, Potentiometry, ION-SELECTIVE ELECTRODES, DETECTION LIMIT, RESPONSE PERFORMANCE, CARRIERS INFLUENCE, IMPRINTED POLYMER, NANOTUBES, SENSOR, MEMBRANE, NANOPARTICLES, MERCURY(II)
  • Ankara Üniversitesi Adresli: Evet

Özet

New modified iodide-selective carbon paste electrodes based on a palladium(II) complex were prepared using multi-walled carbon nanotubes and/or metal oxide nanoparticles to demonstrate the feasibility of the nanocomposite approach to enhance the selectivity of their sensing layer. The question of whether or not the performance characteristics of the electrodes were affected by the incorporation of these materials was investigated. The linear working ranges and slopes of these electrodes were determined for comparison to specify the optimum nanosensing layer of the carbon paste electrode for better iodide sensitivity. The results showed that the introduction of multi-walled carbon nanotubes improved the Nernstian slope of the electrode from a value of 43.8 +/- 0.6 to 57.7 +/- 1.8 mV/pI at pH = 4.0. The response time, the detection limit, and a lifetime of the electrode were found as < 5 s, 2.9 x 10(-8) mol dm(-3), and >= 4 months, respectively. Furthermore, the proposed electrode with improved selectivity was successfully employed for the determination of iodide in a pharmaceutical sample by potentiometric titration.