Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9743388 | Analytica Chimica Acta | 2005 | 6 Pages |
Abstract
A new polyvinylchloride-based membrane of rubeanic acid as an ion carrier was fabricated using oleic acid as lipophilic additive. The best performance was exhibited by the membrane having composition rubeanic acid:PVC:OA:o-NPOE as 5:180:18:208 (w/w). The sensor exhibited a Nernstian response for La3+ over a wide concentration range of 3.2Â ÃÂ 10â8 to 1.0Â ÃÂ 10â2Â M with a detection limit of 2.5Â ÃÂ 10â8Â M. It showed response time of less than 15Â s and could be used for 5 months without any significant divergence. The proposed membrane sensor revealed good selectivity for La3+ over a wide variety of other metal ions and can be used in a pH range of 3.5-9.5 and in mixtures containing up to 30% (v/v) non-aqueous content. It was successfully used as an indicator electrode in the potentiometric titration of La(III) against EDTA.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
A.K. Jain, A.K. Singh, Sameena Mehtab, Puja Saxena,