Mg(II) selective PVC membrane electrode based on methyl phenyl semicarbazone as an ionophore

A pvc-membrane-based mg(ii) selective electrode was constructed using methyl phenyl semicarbazone (mps) as a neutral carrier. the sensor exhibits a nernstian response for mg(ii) ion over a wide concentration range 1.0 × 10 - 8 to 1.0 × 10 - 1 m with the slope of 28.4 mv/per decade having detection limit 1.7 × 10 - 9 m. it was relatively a fast response time (< 10 s for concentration ≥ 1.0 × 10 - 3 and < 15 s for concentration of ≥ 1.0 × 10 - 6 m) and can be used for 8 months without any considerable divergence in potentials. the proposed sensor revealed relatively good selectivity and high sensitivity for mg(ii) over a mono-,di-,and trivalent cation and can be used in a ph range of 1.0-9.5. it was also successfully used as an indicator electrode in potentiometer titration and in the analysis of concentration of magnesium in various real samples. © 2013 sulekh chandra et al.