TITLE

New Potentiometric Poly(vinyl chloride) Membrane Sensor for Selective Monitoring of Lutetium(III) Based on Di(N-succinimidyl)oxalate

AUTHOR(S)
Pasyar, Samaneh; Zamani, Hassan Ali; Poorghazi-Mahmoodabadi, Mehdy
PUB. DATE
March 2013
SOURCE
International Journal of Electrochemical Science;Mar2013, Vol. 8 Issue 3, p4023
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A new poly(vinyl chloride) membrane chemical sensor has been fabricated for the determination of lutetium(III) in aqueous solutions using Di(N-succinimidyl)oxalate (DSO) as a sensing ionophore. The Lu3+ sensing system was constructed by incorporating Di(N-succinimidyl)oxalate (DSO) as a neutral sensing ionophore, in the plasticized PVC membrane containing sodium tetraphenyl borate as a liphophilic anionic additive. The electrode composition of 30 wt% PVC powder, 8 wt% ionophore (DSO), 60 wt% NB, and 2 wt% NaTPB showed the stable potential response to Lu3+ ions with the Nernstian slope of 20.5±0.3 mVdecade-1 with a detection limit of 7.5×10-8 mol L-1. In the pH range of 2.8-9.1, the sensor exhibits a wide concentration range of 1.0×10-7 to 1.0×10-2 mol L-1, with a relatively fast response time (~5 second). In term of selectivity, Lu3+ sensor has a good selectivity over all lanthanide members and common alkali, alkaline earth, transition, and heavy metal ions. The constructed sensor was successfully used as an indicator in the potentiometric titration of Lu(III) ions with EDTA. It was also applied to the determination of lutetium(III) content in various mixtures of different ions.
ACCESSION #
86669694

 

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