Conditional Stability Constant Determination of Metal Aquatic Fulvic Acid Complexes

Abstract

An ion-exchange chromatography/atomic absorbance spectroscopy method for the determination of the conditional stability constants for metal complexes of an aquatic fulvic acid is described. Employing the Scatchard model, conditional stability constants were determined for metal(II) fulvic acid complexes of cadmium, copper, nickel and zinc at pH 7. The effect of pH on the stability constant of the copper-fulvic acid complex is also described.