NDLI: A new composition for Co(II)-porphyrinbased membranes used in thiocyanate-selective electrodes

Content Provider	CiteSeerX
Author	Vlascici, Dana Fagadar-Cosma, Eugenia Bizerea-Spiridon, Otilia
Abstract	Abstract: In the present paper, the potentiometric response characteristics of a metalloporphyrin-based electrode in o-nitrophenyloctylether (o-NPOE) plasticized polyvinyl chloride (PVC) membrane are presented for a set of monovalent anions. As membrane ionophore, 5,10,15,20-tetrakis-(4-methoxyphenyl)-porphyrin-Co(II) (CoTMeOPP) was used. To establish the optimum composition of the membrane, different molar percents of cationic derivative (mol. % relative to ionophore) were used. Electrodes formulated with membranes containing 1 wt. % ionophore, 66 wt. % o-NPOE, 33 wt. % PVC (plasticizer: PVC = 2:1) and the lipophilic cationic derivative (35 mol%) are shown to exhibit high selectivity for thiocyanate with a near-Nernstian slope in the working concentration range of 1.0×10 −1 –1.0×10 −5 M, with a good stability in time.
File Format	PDF
Journal	Sensors 2006
Language	English
Access Restriction	Open
Subject Keyword	Thiocyanate-selective Electrode New Composition High Selectivity Membrane Ionophore Near-nernstian Slope Monovalent Anion Lipophilic Cationic Derivative Present Paper Polyvinyl Chloride Optimum Composition Cationic Derivative Potentiometric Response Characteristic Concentration Range Good Stability Metalloporphyrin-based Electrode Different Molar Percent
Content Type	Text
Resource Type	Article

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