Selective Determination of Zn2+ Ion in Various Environmental, Biological and Medicinal Plant Samples Using a Novel Coated Graphite Electrode. Issue 11 (20th September 2013)

• Record Type: Journal Article
• Authors: Upadhyay, Anjali; Singh, Ashok Kumar; Rao Bandi, Koteswara; Jain, A. K.
• Is Part Of: Electroanalysis. Volume 25:Issue 11(2013:Nov.)
• Page Start: 2453
• Page End: 2462
• Publication Date: 2013-09-20
• Subjects: Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201300225
• Languages: English
• ISSNs: 1040-0397

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Novel Zn²⁺ ion‐selective PVC based coated graphite electrodes were fabricated using the ionophores <italic>N</italic>‐((1<italic>H</italic>‐indol‐3‐yl)methylene)thiazol‐2‐amine (I₁), <italic>N</italic>‐((1<italic>H</italic>‐indol‐3‐yl)methyl)‐thiazol‐2‐amine (I₂) and 1‐((1<italic>H</italic>‐indol‐3‐yl)methylene)urea (I₃). Their potentiometric performance was examined in dependence of the addition of plasticizers and anion excluders and compared. It is found that the coated graphite electrode with the composition I₁:KTpClPB:<italic>o</italic>‐NPOE:PVC=9 : 1.5 : 51 : 38.5 is the best with respect to the wide working concentration range (4.2×10⁻⁸–1.0×10⁻¹ mol L⁻¹), low detection limit (1.6×10⁻⁸ mol L⁻¹) and wide pH range of 3.0–8.0. The proposed electrode was successfully applied to quantify Zn²⁺ in various environmental, biological and medicinal plant samples and used as indicator electrode.</p> </abstract>