Abstract

M. Sudha and J. Thamarai selvi

DOI : http://dx.doi.org/10.13005/ojc/300343

A new simple ion-selective electrode poly (vinyl chloride) membrane sensor for Mg (II) ions based on magnesium Salicylate as a new ionophore has been prepared and studied. The electrode exhibits a good potentiometric response for Mg (II) ion over a wide concentration range 1.0× 10^-5 to 1.0×10^-1 N with a slope value of electrode-I was 23 mv/decade and 28 mv/decade for electrode-II. The electrode can be used over 2 months with good reproducibility. The sensor was used as an indicator electrode in a potentiometric titration of Mg (II) ions against EDTA. The sensor was used to determine the Mg (II) ions in baby food products and spinach.

Ion Selective Electrode; Magnesium; poly (vinyl chloride); Potentiometry

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