Chem. J. Chinese Universities ›› 1992, Vol. 13 ›› Issue (3): 322.

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The Determination of Stability Constants of Complexes of Zn(Ⅱ) and Cd(Ⅱ) with Amino-Acids, Dipeptides and Tripeptides by Micro-pH-Potentiometric Titration

LU Ai-ru1, Pettit L. D.2, Gregor J. E.2   

  1. 1. Department of Chemistry Northwest Normal University, Lanzhou, 730070;
    2. School of Chemistry, University of Leeds, Leeds, England
  • Received:1991-02-05 Online:1992-03-24 Published:1992-03-24

Abstract: A potentiometric study on the complexes of His, Gly-His, Ala-His, Gly-Gly and Gly-Gly-Gly with Zn(Ⅱ), Cd(Ⅱ) is reported and small scale (piston buretle or microsyrine) potentiometric titrations were carried out to determine the stability constants of complexes at 25 ℃ and I = 0.10 mol/L (KNO3) conditions.The data treatment were performed with the computer program TITRE and SUPERQUAD on a BBCmicro-computer.The stisfactory results has been obtained by using this method.

Key words: Zinc(Ⅱ), Cadmium(Ⅱ), Amino-acid, Dipeptide, Tripeptide, Micro-pH-potentio-metric titration

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