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Main Title Determination of the Complexing Capacity of Natural Water.
Author Hanc, Kenneth W. ; Dillar, James W. ;
CORP Author North Carolina Water Resources Research Inst., Raleigh.
Year Published 1973
Report Number 85; DI-14-31-0001-3533; OWRR-A-052-NC; 04312,; A-052-NC(1)
Stock Number PB-227 874
Additional Subjects Complex compounds ; Hydration ; Water chemistry ; Measurement ; Trace elements ; Volumetric analysis ; Polarographic analysis ; Reaction kinetics ; Cobalt ; pH ; Voltammetry
Library Call Number Additional Info Location Last
NTIS  PB-227 874 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 87p
Abstract An analytical procedure for chemically measuring the complexing capacity (ability of a water to complex metal ions) of natural water is developed and tested. The procedure can be used in evaluating the role of natural complexing agents in the transport, toxicity, and availability of trace metal ions in natural waters. Three methods were evaluated, two based on micro scale complexometric titration using anodic stripping voltammetry, and a third, the recommended procedure, involving chemical conversion of the ligands (substances capable of forming metal complexes with metal ions) in the sample to the corresponding cobalt (III) complex. Differential pulse polarography was used to monitor the decreases in cobalt (III) concentration after production of the cobalt (III) complexes and hence the complexing capacity of the sample. This procedure has a detection limit of 0.6 micromoles of ligand per liter.
Highlights Notes Presents an analytical study to evaluate the role of natural complexing agents in the chemistry of trace metal ions in natural waters.
PUB Date Free Form Dec 73,
Category Codes 7D; 8H; 99F#; 48G#
NTIS Prices PC A05/MF A01
Document Type NT
Cataloging Source NTIS/MT
Control Number 326575013
Origin NTIS
Type CAT