A Novel Thulium Selective All-Solid-State Electrode

Aghabalazadeh, Sajjad; Pirali-Hamedani, Morteza; Rezapour, Morteza

doi:10.22034/abec.2024.712242

A Novel Thulium Selective All-Solid-State Electrode

Document Type : Original Article

Authors

Sajjad Aghabalazadeh ¹^{, 2}

Morteza Pirali-Hamedani ³

Morteza Rezapour ⁴

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

10.22034/abec.2024.712242

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^-3M, 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

Sensor

All-solid-state

Potentiometry

Tm3+ cation

Wastewater