Chelation Study of Copper (Ii) : Fulvic Acid System

Cheam, V.

Canadian Journal of Soil Science 53(4): 377-382


ISSN/ISBN: 0008-4271
DOI: 10.4141/cjss73-054
Accession: 068494823

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The chelation reaction between Cu (II) and fulvic acid has been investigated using a relatively new direct approach — that of titration with a cupric ion-selective electrode. The results of different investigators are in fair agreement with each other if they are interpreted in terms of both p H and mole fraction of reactants. In 0.1 M sodium nitrate solutions with a copper mole fraction equal to 0.5 ± 0.2, the equilibrium quotient at 25 C and p H 3 was found to be 2.2 ± 0.1.