A novel sensor based on a heterocyclic ionophore for cerium (III) analysis in real samples

Subject Areas :

Arezoo  Ghaemi ¹ (Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran)
Haman  Tavakkoli ² (Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran)
Fariba  Mehranfar ³ (Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran)

Received: 2016-06-01 Accepted : 2016-06-01 Published : 2012-05-01

Keywords: Potentiometry, PVC membrane, Cerium (III) selective sensor, Kryptofix22DD,

Abstract :

A new polyvinyl choloride (PVC) membrane sensor for cerium (III) was prepared based on 4,13-didecyl-1,7,10,16-tetraoxa-4,13-diazacyclooctadecane (kryptofix22DD) as an ionophore. The sensor exhibites a linear concentration range of 1.0×10-6 to 1.0×10-1 M, with a Nernstian slope of 18.0±1.0 mV/decade, and a detection limit of 9.7×10-7 M. It has a fast response time (5 s) and can be used for two months without any considerable divergence in its potential. The proposed sensor revealed high selectivity toward Ce3+ ion with respect to some alkali, alkaline earth and transition metal cations. It could be used in a wide pH range of 2.0-11.0. The sensor was successfully used as an indicator electrode in potentiometric titration of Ce3+ ion with ethylenediaminetetraacetic acid (EDTA) and sodium iodide (NaI) solutions, and in determination of Ce (III) concentration in real samples