[Comparison of ISE, ASV and FQ for complexation characterization of river water DOC with copper].

Condition stabilization constants of complexation between naturally occurring organic ligand in river water and copper were measured lg k and compared by using ISE, ASV and FQ methods. The measured lg k results were 2 29～6 47 by ISE, 2 61～6 91 by ASV, and 3 52～4 71 by FQ, respectively. The constants went up with the raise of pH, the decrease of copper content, and the increase of ligand concentration.