engleski

Potentiometric Response of a Commercial (Ag2S + PbS)-Membrane Selective Electrode to Hg(II) in Aqueous Solution

The preparation and performance of an Hg(II)-ISE are described. The analytical behavior of this electrode, made by chemical treatment of a commercial silver sulphide type Pb(II)-ISE, is discussed in terms of potential vs. concentration curves, potential vs. pH curves, and selectivity. The response to fixed cHg(II) as the pH is increased in the alkaline region corresponds to decrease in the free Hg2+ concentration down to pHg 17. The estimated limit of detection of total Hg(II) concentration is 10-5 M.

mercury(II) ion-selective electrode ; lead(II) ion-selective electrode ; alkaline medium

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