A new cerium (III) ion selective electrode based on 2,9-dihydroxy-1,10-diphenoxy-4,7-dithia decane, a novel synthetic ligand

► An ISE based on a new ionophore is used successfully to determine cerium (III) cation over the concentration range 1.0 × 10−1-2.1 × 10−9 mol l−1. ► It has a fast response time of 10 s. ► It has comparatively good selectivities with respect to metal cations. ► It can be used in a pH range of 5.0-8.0. ► It also was used as an indicator electrode in potentiometric determination of F− ion in some real sample preparations.