DETERMINATION OF THE COMPLEXATION CAPACITY OF WATERS - MEASUREMENTS ON MODEL SYSTEMS AND NATURAL-WATERS EMPLOYING COPPER AS THE TITRATING ION

The complexation capacity of both model systems and natural waters was investigated by anodic shipping voltammetry (ASV) employing copper as the titrating ion. EDTA, NTA, citrate and humic acids were employed a s model systems. Natural waters from the Santiago River were also inve stigated. In some cases the influence of the electrode rotating speed on the lability of the species involved was investigated. The experime ntal results were analyzed employing diagnosis criteria proposed by pr evious workers for lability, complex strength and stability constants.