A potentiometric sensor of silver ions based on the Schiff base of diphenol
Journal of Solid State Electrochemistry, ISSN: 1432-8488, Vol: 16, Issue: 8, Page: 2591-2596
2012
- 5Citations
- 16Captures
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Article Description
A potentiometric sensor based on the Schiff base 2,2′-(1E,1′E)- (1,1′-binaphthyl-2,2′-diylbis(azan-1-yl-1-ylidene)) bis(methan-1-yl-1-ylidene)diphenol was synthesized and tested as an ionophore PVC-based membrane sensor selective towards silver ions (Ag ). Potentiometric testing demonstrated the high affinity of this receptor to silver ions. Seven membranes were fabricated with different compositions, with best performance shown by that with an ionophore composition (w/w) of 1.0 mg, PVC 33.0 mg, 2-nitrophenyl octyl ether 66 mg, and potassium tetrakis(pchlorophenyl) borate 50 mol% in 1.0 mL tetrahydrofuran. The sensor worked well over a wide range of concentrations (1.0×10 to 1.0×10-6 M Ag ) at pH 6, showing a slope of 60.99 mV/dec with rapid response times of less than 3 s. The sensor also showed good selectivity towards Ag in the presence of interfering cations, with the highest selectivity coefficient observed for Hg (2.7). A low detection limit of 3.4×10-7 M Ag was established. © Springer-Verlag 2012.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84865512170&origin=inward; http://dx.doi.org/10.1007/s10008-012-1682-y; http://link.springer.com/10.1007/s10008-012-1682-y; http://link.springer.com/content/pdf/10.1007/s10008-012-1682-y; http://link.springer.com/content/pdf/10.1007/s10008-012-1682-y.pdf; http://link.springer.com/article/10.1007/s10008-012-1682-y/fulltext.html; http://www.springerlink.com/index/10.1007/s10008-012-1682-y; http://www.springerlink.com/index/pdf/10.1007/s10008-012-1682-y; https://dx.doi.org/10.1007/s10008-012-1682-y; https://link.springer.com/article/10.1007/s10008-012-1682-y
Springer Science and Business Media LLC
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