Potentiometric Sensing of Thorium Ions Using PVC Matrix Electrodes Based on Crown Ethers
Zeinab Akl
Abstract:New potentiometric membrane sensors have been designed to measure Th 4+ ions using two derivatives of 18-crown-6-ether as neutral ion-carriers. The membrane composition was optimized through a multi-stage process regarding plasticizers, lipophilic ionic additives, and ion-carrier content and the corresponding sensors' performance characteristics were investigated. The optimized sensors exhibited a Nernstian behavior for Th 4+ ions over wide working concentration and pH ranges. The sensors' repeatability, repro… Show more
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