10. A novel ion-selective electrodebased on 3-nitrobenzaldehyde-thiosemicarbazone for potentiometric determination of Ce(III) ions

Sulekh Chandraa , Dev Raj Singha & P.K.Sahub

aDepartment of Chemistry Zakir Husain College (University of Delhi), J.L.N.Marg, New Delhi-110002, India
 bDepartment of Chemistry Shiwaji College (University of Delhi) Raja Garden New Delhi-110027, India
*Corresponding author:  schandra_00@yahoo.com

ABSTRACT

A novel Ce(III)-selective membrane sensor based on 3-nitrobenzaldehyde--thiosemicarbazone (NBTSC) was prepared. The plasticized membrane sensor on 3-nitrobenzaldehyde-thiosemicarbazone (NBTSC) exhibits a Nernstian response for Ce(III) ions over a relatively wide concentration range (1.0x10^-1to 1.5x10^-7M) with a limit of detection of 1.1x10^-8M. It has a fast response time of <10 s and can be used for at least 24 weeks without observing any major deviation. The sensor revealed very good selectivity with respect to diverse ions. The response of the proposed sensor is independent on pH in the range 2.7 to 9.8. It was used as an indicator electrode, and also used for indirect determination in water samples.


Keywords: Ce(III), Ion-selective electrode, PVC membrane, Potentiometry.

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