A Novel Thulium Selective All-Solid-State Electrode

Document Type : Original Article

Authors

1 CinnaGen Medical Biotechnology Research Center, Alborz University of Medical Sciences, Karaj, Iran

2 CinnaGen Research and Production Co., Alborz, Iran

3 Department of Medicinal Chemistry, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran

4 IP Department, Research Institute of Petroleum Industry (RIPI), Tehran Iran

Abstract

A new all-solid-state ion selective electrode (ASS-ISE) was developed for the determination of thulium trivalent cation. The potentiometric sensor was made by depositing a thin PVC membrane containing N՛-[(2-hydroxyphenyl)methylidene]-2-furohydrazide (L) as a selectophore on a conducting solid-state electrode. The solid-state electrode was a thin copper wire coated by a mixture of multi-walled carbon nanotubes (MWCNTs) and an epoxy resin. The optimal composition of the PVC membrane was 25%wt. of PVC powder, 68% wt. of benzyl acetate, 2% wt. of sodium tetraphenyl borate (NaTPB)), and 5% wt. of L. The sensor showed good selectivity for Tm3+ ion with a Nernstian calibration plot slope of 19.6±0.4 mV/decade in Tm3+ ion solutions with concentrations ranging from 1.0×10-8 M to 1.0×10-3 M, and its limit of detection was as low as 6.3×10-9 M. The proposed sensor was able to detect Tm3+ cations in the wastewater matrix. 

Keywords

Analytical and Bioanalytical Electrochemistry
Volume 16, Issue 3
March 2024
Pages 269-279

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History

  • Receive Date: 21 November 2023
  • Revise Date: 23 February 2024
  • Accept Date: 27 February 2024

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