A cerium(III) selective polyvinyl chloride membrane sensor based on a Schiff base complex of N,N'-bis[2-(salicylideneamino)ethyl]ethane-1,2-diamine

Vinod Kumar Gupta; A K Singh; Barkha Gupta

doi:10.1016/j.aca.2006.05.090

A cerium(III) selective polyvinyl chloride membrane sensor based on a Schiff base complex of N,N'-bis[2-(salicylideneamino)ethyl]ethane-1,2-diamine

Anal Chim Acta. 2006 Aug 11;575(2):198-204. doi: 10.1016/j.aca.2006.05.090. Epub 2006 Jun 3.

Authors

Vinod Kumar Gupta¹, A K Singh, Barkha Gupta

Affiliation

¹ Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India. vinodfcy@iitr.ernet.in

PMID: 17723591
DOI: 10.1016/j.aca.2006.05.090

Abstract

A polyvinyl chloride (PVC) based membrane sensor for cerium ions was prepared by employing N,N'-bis[2-(salicylideneamino)ethyl]ethane-1,2-diamine as an ionophore, oleic acid (OA) as anion excluder and o-nitrophenyloctyl ether (o-NPOE) as plasticizer. The plasticized membrane sensor exhibits a Nernstian response for Ce(III) ions over a wide concentration range (1.41 x 10(-7) to 1.0 x10 (-2) M) with a limit of detection as low as 8.91 x 10(-8) M. It has a fast response time (<10s) and can be used for 4 months. The sensor revealed a very good selectivity with respect to common alkali, alkaline earth and heavy metal ions. The response of the proposed sensor is independent of pH between 3.0 and 8.0. It was used as an indicator electrode in potentiometric titration of fluoride, carbonate and oxalate anions and determination of cerium in simulated mixtures.