Determinaciones de Hg (I) con ácidos poliaminopolicarboxílicos II. Valoraciones Bipotenciométricas y Amperométricas

Authors

  • C. Sánchez Pedreño
  • J.H. Hidalgo de Cisneros

Abstract

The polarografic behaviour of Hg(I) with the agents EDTA, EGTA, DCTA and DTPA at pH 5.5 (urotropina-HNO3) with the use of dropping mercury electrode or platinum is presented. The experimental conditions for the determination of Hg22+ e with those agents, obtained Erom the study of i-E curves, are given. The determinations are carried out for bipotentiometric method at pH 5.5 (urotropine-HNO3) with employ of two Hg or Pt electrode (1.5 μA). Amperometric determinations are realized with Pt-SCE (—200 mV), at the same médium, in the range of concentrations M/lOO-M/2.500. The theoric explanation of the diferent processes imphcated is given.

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