Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10410988 | Sensors and Actuators B: Chemical | 2005 | 5 Pages |
Abstract
A poly (vinyl chloride)-based membrane of 2,3,4-pyridine-1,3,5,7,12-pentaazacyclopentadeca-3-ene with sodium tetraphenylborate(NaTPB) as an anion excluder and dioctyl phthalate (DOP) as plasticizer was prepared and investigated as a Ba(II)-selective electrode. The best performance was observed with the membrane having the ligand-PVC-DOP-NaTPB composition 1:4:1:1, which worked well over a wide concentration range (1.41 Ã 10â6-1.0 Ã 10â1 mol Lâ1) with a Nernstian slope of 30.0 mV per decade of activity between pH 2.5 and 7.0. This electrode showed a fast response time of 18 s and was used over a period of 3 months with good reproducibility (S = 0.4 mV). The selectivity coefficient for mono-, di- and trivalent cations indicates excellent selectivity for Ba(II) ions over a large number of cations. Electrode works satisfactorily in methanolic and ethanolic content up to a maximum of 30%. The sensor has been used as an indicator electrode in potentiometric titration of Ba(II) with EDTA.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Ashok Kumar Singh, Rupam Singh, R.P. Singh, Puja Saxena,