Journal of Chemical and Pharmaceutical Research (ISSN : 0975-7384)

header
Reach Us reach to JOCPR whatsapp-JOCPR +44 1625708989
All submissions of the EM system will be redirected to Online Manuscript Submission System. Authors are requested to submit articles directly to Online Manuscript Submission System of respective journal.

Original Articles: 2011 Vol: 3 Issue: 4

Influence of Metal Ions as Interfering Species on Potentiometric Behavior of Tb(III) Ion-Selective Electrode

Abstract

A new terbium(III) sensor based on 1, 3-Diaminopropane-N,N,N',N'-tetraacetic acid as a suitable ionophore is described. The electrode comprises 3% ionophore, 30% PVC, 65% NB and 2% NaTPB. The sensor has a linear dynamic range of 1.0×10−8 to 1.0×10−2 M with a Nernstian slope of 19.8±0.4 mV per decade and a detection limit of 8.4×10−9 M. In this study, potentiometric selectivity coefficients, describing the preference of the membrane for terbium ions relative to an interfering ion, were determined by the matched potential method (MPM). The proposed sensor shows a very good selectivity towards a large number of cations, such as Yb(III), Gd(III), Eu(III), Ho(III), Tm(III), Fe(III), Na(I), K(I), Ca(II), Mg(II), Zn(II), Co(II), Cd(II), Ni(II) and Pb(II) in comparison with former ones. It was used as an indicator electrode in the potentiometric titration of Tb(III) ions with EDTA. The sensor was applied to the determination of Tb(III) ions concentration in water samples solutions.

http://sacs17.amberton.edu/

rtp slot demo