Thallium(I)-selective membrane potentiometric sensor based on dibenzyldiaza-18-crown-6

Abstract

A new thallium(I) selective electrode based on dibenzyldiaza-18-crown-6 as membrane carrier was successfully prepared. The electrode exhibits a near-Nernstian response for Tl+ ions over a wide concentration range from 1.0 × 10-5-1.0×10-1 M at 25 °C, and was found to be selective, precise and useable within the pH range 4.0-11.0. The electrode was successfully used as an indicator electrode in potentiometric titration of thallium ions.