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Samarium (III) Selective Membrane Sensor Based on Tin (IV) Boratophosphate
School of Chemistry & Biochemistry, Thapar Institute of Engineering & Technology (Deemed University), Patiala 147004, India
* Author to whom correspondence should be addressed.
Received: 9 March 2004 / Accepted: 28 August 2004 / Published: 30 August 2004
Abstract: A number of Sm (III) selective membranes of varying compositions using tin (IV) boratophosphate as electroactive material were prepared. Polyvinyl chloride, polystyrene and epoxy resin were used as binding materials. Membrane having composition of 40% exchanger and 60% epoxy resin exhibited best performance. This membrane worked well over a wide concentration range of 1x10-5M to 1x10-1 M of samarium ions with a Super-Nernstian slope of 40 mV/decade. It has a fast response time of less than 10 seconds and can be used for at least six months without any considerable divergence in potentials. The proposed sensor revealed good selectivities with respect to alkali, alkaline earth, some transition and rare earth metal ions and can be used in the pH range of 4.0-10.0. It was used as an indicator electrode in the potentiometric titration of Sm (III) ions against EDTA. Effect of internal solution was studied and the electrode was successfully used in non-aqueous media, too.
Keywords: Inorganic ion exchanger; ISE; Sm (III); FIM; potentiometric titration
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Cite This Article
MDPI and ACS Style
Mittal, S.K.; Sharma, H.K.; Kumar, A.S.K. Samarium (III) Selective Membrane Sensor Based on Tin (IV) Boratophosphate. Sensors 2004, 4, 125-135.
Mittal SK, Sharma HK, Kumar ASK. Samarium (III) Selective Membrane Sensor Based on Tin (IV) Boratophosphate. Sensors. 2004; 4(8):125-135.
Mittal, Susheel K.; Sharma, Harish K.; Kumar, Ashok S.K. 2004. "Samarium (III) Selective Membrane Sensor Based on Tin (IV) Boratophosphate." Sensors 4, no. 8: 125-135.