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SENSORS

Application of Novel Praseodymium (III) PVC‐Membrane Electrode for Determination of Pr(III) Ions in Soil and Sediment Samples

, , &
Pages 902-916 | Received 20 Nov 2007, Accepted 14 Dec 2007, Published online: 03 Apr 2008
 

Abstract

A novel Pr(III) ion‐selective polyvinyl chloride (PVC) membrane sensor, based on N,N‐bis(α‐methylsalicylidene)diethylenetriamine (BMT) as a new ionophore, has been prepared and studied. The electrode showed good selectivity for Pr(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 19.8±0.2 mV per decade and a low detection limit of 6.5×10−7 M, in the pH range of 3.0–8.4, while response time was rapid (<15 s). As far as applications of the recommended sensor are concerned, first it was employed as an indicator electrode in the potentiometric titration of Pr(III) ions with EDTA. Second, it was effectively applied to the determination of concentration of Pr(III) ions in soil and sediment samples, and validation with CRMs.

The authors acknowledge the kind financial support provided by the Research Council of Quchan University for the preparation of this study.

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