Silver ion-selective electrodes based on novel containing benzothiazolyl calix[4]arene Original Research Article

The silver ion-selective electrodes (ISEs) were prepared by incorporating four novel calix[4]arene derivatives substituted by benzothiazolyl units, as the neutral carrier into the plasticized polymeric membranes. The construction, response characteristic and application of silver ISEs were investigated. The better results were obtained with membranes containing bis(2-benzothiazolyl) groups (ligand 1,2) with dibutyl phosphate (DBP) as a plasticizer. The electrodes show good Nernstial response to Ag+ over a wide concentration range (5×10−6–1×10−1 M) for electrodes based on calix[4]arene derivatives containing benzothiazolyl groups and excellent selectivity against alkali, alkaline earth and some transition metal ions. The electrode was used as indicator electrode in titration of Ag+ with Cl− ions.