• V S Vasantha

      Articles written in Journal of Chemical Sciences

    • Electrochemical behaviour of zinc gluconate complexes

      V S Vasantha V S Muralidharan

      More Details Abstract Fulltext PDF

      Voltammetric studies revealed that under transient conditions in the pH range 3.7 to 5.0, the deposition of zinc from ZnSO4 solutions involves the formation of adsorbed monovalent zinc. The conversion of divalent zinc to monovalent is a slow step. In the presence of gluconate, the reduction of divalent complex involves the monovalent zinc complex and the second electron transfer is slow. In the pH range 10 to 12.5, the zinc complex may be [(Zn(GH4)4]2- and is found to vary with gluconate and OH- ions. The conversion of [Zn(GH4)(OH)abs-] to Zn(OH)2 or Zn(GH4)2 is the slow step in the reduction of the complexes. In strong alkali solutions sodium gluconate forms zinc hydroxy gluconate complexes. [Zn(OH)3(GH4)]2- to adsorbed [Zn(OH)(GH4)]- is the slow step in the reduction.

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