Ion imprinted polymer based ion-selective electrode for the trace determination of dysprosium(III) ions |
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Authors: | K. Prasad T. Prasada Rao G.R.K. Naidu |
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Affiliation: | a Trace Analysis Group, Regional Research Laboratory (CSIR), Trivandrum 695 019, India b Department of Environmental Sciences, S.V. University, Tirupati 517 502, India |
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Abstract: | Ion-selective electrode (ISE) was designed by dispersing the dysprosium(III) IIP particles in 2-nitrophenyloctyl ether plasticizer and then embedded in polyvinyl chloride matrix. The ISE shows a Nernstian response for dysprosium(III) over a wide concentration range (8.0 × 10−6 to 1.0 × 10−1 M) with a slope of 21.7 mV per decade. The limit of detection was 2 × 10−6 M. This sensor has a very fast response time (∼10 s) and offers high selectivity compared to conventional chemical sensors towards dysprosium(III) with respect to several alkali, alkaline earth and transition metal ions as the selectivity is 10-100-fold better. The sensor was used for determination of dysprosium(III) ions by potentiometric (EDTA) titration and has been successfully demonstrated for the determination of fluoride in mouth wash solution. |
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Keywords: | Ion imprinted polymer particles Ion-selective electrode Dysprosium(III) Fluoride Mouthwash |
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