Determination of Trace Silver by Catalytic Method with CN Ion Selective Electrode

Abstract

Abstract: This paper reports a catalytic method for determing silver (I), using CN-ion selective clectrode which is based on the reaction between potassium ferrocyanide and water with silver(I) ion catalyst and a,a'-bipyridyl as the activator.Taking a fixed time procedure, the potential difference of catalytic and noncatalytic reaction is linearly related to the concentration of silver (I) ion in the range of 2.5×10^-9～8.0× 10^-8 mol/L.Using the proposed method, we determined the mount of sisver in four standard samples of silicate with satisfactory result.The reaction mechanism is as discussed.

Key words: Ion selective electrode, Kinetic analysis, Catalytic method, Silver

TrendMD:

Yang Shuxun, Ma Wanhong . Determination of Trace Silver by Catalytic Method with CN Ion Selective Electrode[J]. Chem. J. Chinese Universities, 1989, 10(9): 962.

References

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