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International Journal of Electrochemistry
Volume 2016, Article ID 9075651, 7 pages
Research Article

Determination of Thallium(I) by Hybrid Mesoporous Silica (SBA-15) Modified Electrode

Department of Chemistry, M.M.H. College, Ghaziabad 201001, India

Received 6 October 2015; Revised 1 March 2016; Accepted 7 March 2016

Academic Editor: Grzegorz Milczarek

Copyright © 2016 Geeta Rani and Sanjay Singh. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Chemically modified mesoporous silica material (SBA-15) was used for the construction of Tl(I) selective carbon paste electrode. The best response was found with the electrode containing 10% modifier as electrode material. The electrode has a lower detection limit of 6.0 × 10−9 M in a working concentration range of 1.0 × 10−8–1.0 × 10−1 M. The selectivity coefficient calculated by match potential method (MPM) shows the high selectivity of electrode towards Tl(I) over other tested ions. The electrode was successfully applied as an indicator electrode for the titration of 0.01 M TlNO3 solution with standards EDTA solution and for sequential titration of mixture of different anions.