1Department of Chemistry, Mewar University, Chittorgarh, Rajasthan– 312901, India
2Department of Chemistry, M.M.H. College, Ghaziabad (U.P) 201001, India
*Corresponding Author E-mail: drsingh.20@yahoo.com
Online published on 7 February, 2013.
The work in this paper is related with the synthesis and used of 2,11, 17, 23-Tetra-tert-butyl-22,27-bis-[(5′-hydroxy-3′thiapentoxy)]-26, 28 dihydroxy calix[4] arene as electroactive material for the selective determination of La(III). The proposed with composition of o-NPOE: PVC: NaTPB: Ionophore (57%: 37%: 5%: 1%) shows the best results. The electrode with o-NPOE as plasticizer worked in the concentration range of 1.0 x 10−9-1.0 x 10−2with a detection limit of 1.0 x 10−9and has Nernstian slope of 21.10 ± 0.3 mV per decade of activity, with a fast response time of 10s within the pH range of 1.5 to 9.5. The proposes electrode work satisfactorily in partial non-aqueous medium up to 30% nonaqueous content of methanol, ethanol and acetone, and was used as an indicator electrode for the titration with standard EDTA solution.
