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A new Eu 3+ PVC membrane electrode based on 1,2-diaminopropane- N, N,N',N' -tetraacetic acid (DAPTA) as a suitable ionophore has been prepared and studied. The electrode shows a good selectivity for Eu(III) ion with respect to most common cations including alkali, alkaline earth, transition and heavy metal ions. This electrode has a wide linear dynamic range from 1.0×10 -6 to 1.0×10 -2 M with a Nernstian slope of 19.7±0.5 mV per decade and a low detection limit of 7.2×10 -7 M in the pH range of 2.5–9.1, while the response time was rapid (&lt;10 s). The practical utility of the electrodes has been demonstratedby their use as indicator electrodes in the potentiometric titration of Eu 3+ ions with EDTA and for the determination of Eu 3+ in some water sample solutions.

Construction of Eu3+Ion-Selective Electrode Based on 1,2-Diaminopropane-N,N,N',N'-tetraacetic acid

Construction of Eu³⁺Ion-Selective Electrode Based on 1,2-Diaminopropane-N,N,N',N'-tetraacetic acid