Ion imprinted polymer based ion-selective electrode for the trace determination of dysprosium(III) ions

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 x 10(-6) to 1.0 x 10(-1) M) with a slope of 21.7 mV per decade. The limit of detection was 2 x 10-6 M. This sensor has a very fast response time (similar to 10 s) and offers high selectivity compared to conventional chemical sensors towards dysprosium(Ill) 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. (c) 2006 Elsevier B.V. All rights reserved.