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Sensors 2006, 6(8), 892-900; doi:10.3390/s6080892
Article

A New Composition for Co(II)-porphyrin-based Membranes Used in Thiocyanate-selective Electrodes

1, 2,*  and 1
Received: 22 April 2006; Accepted: 26 July 2006 / Published: 24 August 2006
(This article belongs to the Special Issue Supramolecular Sensors)
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Abstract: In the present paper, the potentiometric response characteristics of ametalloporphyrin-based electrode in o-nitrophenyloctylether (o-NPOE) plasticizedpolyvinyl chloride (PVC) membrane are presented for a set of monovalent anions. Asmembrane ionophore, 5,10,15,20-tetrakis-(4-methoxyphenyl)-porphyrin-Co(II)(CoTMeOPP) was used. To establish the optimum composition of the membrane, differentmolar percents of cationic derivative (mol.% relative to ionophore) were used. Electrodesformulated 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 toexhibit high selectivity for thiocyanate with a near-Nernstian slope in the workingconcentration range of 1.0×10−1–1.0×10−5 M, with a good stability in time.
Keywords: metalloporphyrins; thiocyanate; anion-selective electrode; near-Nernstian slope. metalloporphyrins; thiocyanate; anion-selective electrode; near-Nernstian slope.
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.

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MDPI and ACS Style

Vlascici, D.; Fagadar-Cosma, E.; Bizerea-Spiridon, O. A New Composition for Co(II)-porphyrin-based Membranes Used in Thiocyanate-selective Electrodes. Sensors 2006, 6, 892-900.

AMA Style

Vlascici D, Fagadar-Cosma E, Bizerea-Spiridon O. A New Composition for Co(II)-porphyrin-based Membranes Used in Thiocyanate-selective Electrodes. Sensors. 2006; 6(8):892-900.

Chicago/Turabian Style

Vlascici, Dana; Fagadar-Cosma, Eugenia; Bizerea-Spiridon, Otilia. 2006. "A New Composition for Co(II)-porphyrin-based Membranes Used in Thiocyanate-selective Electrodes." Sensors 6, no. 8: 892-900.


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