A New Europium (III) Sensor based on Titanium [IV] Tungstophosphate as an Electroactive Material

作者：Sharma H K^*; Sharma N

来源：Research Journal of Chemistry and Environment, 2013, 17(3): 34-39.

• Inorganic ion exchange
• Eu (III)
• TiWP
• Potentiometric titration
• sensors

An inorganic ion exchanger Titanium [IV] tungstophosphate [TiWP] has been synthesized and then characterized as ion exchanger by finding its ion exchange capacity (0.70 meq/g). Epoxy resin, SBR and PVC were used as binders to form the membranes of various compositions and the effect of internal solution was studied. Titanium tungstophosphate: epoxy resin (40%: 60%) membrane has shown best response towards Eu(III) ions and its wide linear working range was 1.0x10(-5) to 1.0x10(-1) M with a near-Nernstian response of 21.0 mV/decade.
The detection limit was 1.0x10(-6) M. The observed response time of the sensor was only 10 seconds. The electrode was found to show satisfactory behavior in partially non-aqueous media of methanol, ethanol and acetone. The potentiometric response is independent of the pH of the solution in the pH range 2.9-8.9. The sensor has been used as an indicator electrode in the potentiometric titration of Eu (III) ions against EDTA and oxalic acid.

• 出版日期2013-3