http://dx.doi.org/10.1080/10610270902893734">
 

Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Development and application of a fluorescent sensor for potassium ions based on a calix[6]arene ionophore and a novel cationic dye

Language

English

Abstract

A plasticised poly(vinyl chloride) optode membrane incorporated with a calix[6]arene hexaester, a H+-selective chromoionophore (3,3′,5,5′-tetramethyl-N,N-dibenzylbenzidine, a novel synthetic cationic dye) and a lipophilic potassium tetrakis(4-chlorophenyl)borate was used as a sensing device for the indirect optical determination of potassium ions. It exhibited a reversible response to the potassium ion in 0.05 mol/l HCl buffer media in the concentration range from 1 × 10-6 to 1 × 10-2 mol/l. The linear range was from 1.53 × 10-5 to 3.20 × 10-3 mol/l. The proposed optode sensor exhibited a fast response of less than 1 min, good repeatability (n 1/4 7, RSD 1/4 3.62%) at 5 × 10-5 mol/l, and long-term stability with 92% of its initial sensitivity after 1 month of storage. The selectivity of the potassium-selective membrane allows its application for the detection of the potassium concentration in real sample analysis. The result was satisfactory compared with atomic absorption spectrometry. © 2009 Taylor & Francis.

Keywords

Calix[6]arene hexaester supramolecular, Ion-exchange mechanism, Optode membrane, Potassium ion

Publication Date

2009

Source Publication Title

Supramolecular Chemistry

Volume

21

Issue

8

Start Page

747

End Page

753

Publisher

Taylor & Francis

ISSN (print)

10610278

ISSN (electronic)

10290478

This document is currently not available here.

Share

COinS