Analytical chemistry 2010-01-01

Magnesium-selective ion-channel mimetic sensor with a traditional calcium ionophore.

Jingwei Zhu, Yu Qin, Yunhong Zhang

Index: Anal. Chem. 82(1) , 436-440, (2010)

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Abstract

A novel magnesium-selective ion-channel mimetic sensor based on a well-known calcium ionophore, ETH 5234, was demonstrated. Due to different stoichiometry of the ionophore with Mg(2+) and Ca(2+), the sensor exhibits high selectivity to Mg(2+) by controlling ionophore concentration on the electrode surface, which allows the measurement of Mg(2+) in a 1 mM Ca(2+) background solution.