Voltammetric Study of Poly Aspartic Acid-Cd 2 + and / or Zn 2 + Complex in the Helix-coil Transition pH Region


Helix-coil transition of poly aspartic acid (PASP) was investigated by dc polarography in the presence of Cd2+ and/or Zn2+ as a detecting marker which attached to the polymer. The diffusion currents (id) of Cd2+ and Zn2+ decreased sharply in the pH range of 3.5-7.0 due to the formation of the metal ions-PASP macromolecular complexes. The complex formation… (More)

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