A Highly Selective and Sensitive Potentiometric Sensor for Copper (II) Ions Using a Schiff Base-Derived Ionophore (E)-2 ((1H-pyrrol-2-yl) methylene amino) benzenethiol

Narendra Kumar

International Journal of Scientific Research in Chemistry, 2026, vol. 11, issue 3, 51-63

Abstract: A copper (II)-selective electrode based on a PVC membrane was fabricated using the Schiff base (E)-2-((1H-pyrrol-2-yl) methylene amino) benzenethiol (I) as the ionophore, and its performance was systematically evaluated. The optimized membrane composition consisted of PVC, ionophore, and plasticizer in a 35:2:63 ratio. The sensor exhibited a Nernstian response toward Cu²⁺ ions, with a detection limit of 2.0 × 10⁻8 M and an effective linear range from 3.1 × 10⁻8 M to 1.0 × 10⁻¹ M. A rapid response time of about 8 seconds was observed upon immersion in the test solution. The electrode potential remained stable across a pH interval of 2.0 to 10 The electrode exhibited stable and reliable performance for nearly four months without any noticeable potential drift. In addition, it showed excellent selectivity toward Cu²⁺ ions in the presence of alkali, alkaline earth, transition, and other heavy metal ions. The sensor was effectively employed as an indicator electrode in the potentiometric titration of Cu²⁺ with EDTA and was successfully utilized for the determination of copper ions in real sample matrices.

Keywords: Poly vinyl chloride; Selectivity coefficients; Indicator electrode; Copper ions (search for similar items in EconPapers)
Date: 2026
Note: Article URL: https://ijsrch.com/home/article/view/IJSRCH261136
References: Add references at CitEc
Citations:

Downloads: (external link)
https://ijsrch.com/home/article/view/IJSRCH261136 Article URL (text/html)
https://ijsrch.com/home/article/download/IJSRCH261136/IJSRCH261136 Full text (application/pdf)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:cuo:ijsrch:v11:y2026:i3:id:96

DOI: 10.32628/IJSRCH261136

Access Statistics for this article

More articles in International Journal of Scientific Research in Chemistry from International Journal of Scientific Research in Chemistry
Bibliographic data for series maintained by Pankaj Sharma ().