Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (10): 873-878.doi: 10.3866/PKU.WHXB20011003

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Study on Interactions of Gelatin with Cu2＋ and Fe3＋

Tang Shi-Hua;Huang Jian-Bin   

  1. Institute of Physical Chemistry, Peking University, Beijing　100871
  • Received:2001-02-21 Revised:2001-05-09 Published:2001-10-15
  • Contact: Huang Jian-Bin E-mail:jbhuang@chem.pku.edu.cn

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Abstract: Interaction of the gelatin with Cu2＋ and Fe3＋ are investiged at different pH and temperatures by fluorescence quenching method. The mechanisms of fluorescence quenching of Cu2＋ and Fe3＋ to gelatin are studied at different pH. The quenching constants, binding constants, and the thermodynamic functions are calculated. The results of microIR and UV show that Cu2＋ and Fe3＋ interacte with the amido bond in the gelatin molecule. The entropy change is a main factor in the interaction process of the gelatin with Cu2＋ and Fe3＋.

Key words: Gelatin, Influence of metal ions, Fluorescence quenching, Chelates gelatin with Cu2＋ and Fe3＋