In this paper, the synthesis of a novel ionophore, chloro[5,10,15,20-tetrakis[2-(2,3,4,6-tetraacetyl-
β-
D-glucopyranosyl)-1-
O-phenyl]porphinato]manganese (MnT(
o-glu)PPCl), and its application as a neutral carrier for a PVC membrane electrode are described. The MnT(
o-glu)PPCl-based PVC membrane electrode shows a potentiometric responses to SCN
- over a concentration range of 3.4 × 10
-7 - 1.0 × 10
-1 mol L
-1 with a Nernstian slope and a response time of 20 s. The electrode exhibits an anti-Hofmeister selectivity toward SCN
- with respect to common coexisting anions. As active materials, MnT(
o-glu)PPCl shows better selectivity toward SCN
- than chloro(tetraphenylporphinato)manganese (MnTPPCl). The effect of the electrode membrane compositions has been studied and the experimental conditions were optimized. The electrode was applied to the determination of SCN
- in body fluids with satisfactory results.
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