Novel Solid Contact Ion Selective Sensor for Potentiometric Analysis of Barium Ions

Abstract

Barium as an alkaline earth metal is widely used in multiple industries. Due to its widespread use, it is toxic to living things in high concentrations. In this study, polymer membrane barium–selective potentiometric sensors were prepared in which 4-aminobenzoic acid 2-diethylaminoethyl ester was used as an ionophore. The prepared sensors exhibited selective and stable behavior towards barium ions. The novel barium–selective potentiometric sensor had a low detection limit of 4.23×10-6 M over a wide linear concentration range from 1.0×10-5 to 1.0×10-1 M. The sensor proposed in the present study had good repeatability, short response time (8s) and could work over a wide range of pH. The sensors prepared simply and economically were able to determine barium ions in various samples with very high recoveries.

Keywords

• Barium(II)
• sensor
• potentiometry
• ion–selective electrodes

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