2013
Solid-contact Hg(II)-selective electrode basedon a carbon-epoxy composite containing anew dithiophosphate-based ionophoreJuarez-Gomez J., Perez-Garcia F.,Ramirez-Silva M.T., Rojas-Hernandez A.,Galan-Vidal C.A., Paez-Hernandez M.E.(2013) Talanta 114 235-24
Abstract
The experimental results herein concern a novel ion-selective electrode manufactured with an inner solid contact based on a new ligand O,O?-(2,2?-biphenylene)dithiophosphate pentyl (PenDTF). This electrode displays high selectivity toward the Hg(II) ion even in the presence of different divalent ions. The electrode also exhibited a good Nernstian response to Hg(II) (33.71.0 mV decade?1) over an ample concentration range (5.3×10?7?1.0×10?2 mol L?1), with a detection limit of (6.11.7)×10?7 mol L?1. As a result of design, the electrode can be used for many experiments, simply renewing its contact surface with emery paper, without giving rise to a significant response deviation, exhibiting a variation coefficient of 3%, capable of being tested within the 0?5 pH interval. The electrode was used satisfactorily as indicating electrode during the potentiometric titration of Hg(II) ions with EDTA.
Mercury Ions Removal from Aqueous Solution Using an Activated Composite Membrane
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