Determination of Free Metal Ion Concentrations Using Bioassays
- 1 August 1981
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Fisheries and Aquatic Sciences
- Vol. 38 (8) , 999-1002
- https://doi.org/10.1139/f81-137
Abstract
A procedure was developed by which free metal ion concentrations, toxic to aquatic life, can be calculated by comparing metal toxicity before and after addition of a complexing agent of known complexing capacity. Application of this method suggests that the growth of freshwater copepods is affected at free copper concentrations around 10−10 to 10−9 mol∙L−1. In natural waters, with unidentified ligands of unknown complexing ability, this procedure provides the only method currently available for estimating free metal concentrations at the low levels often causing sublethal toxicity to aquatic organisms.Key words: metal toxicity, complexation, free metal, copepods, copperThis publication has 3 references indexed in Scilit:
- Effect of Metals on the Biomass Production Kinetics of Freshwater CopepodsCanadian Journal of Fisheries and Aquatic Sciences, 1980
- Effects of inorganic complexing on the toxicity of copper to Daphnia magnaWater Research, 1977
- Copper ions as poison in the sea and in freshwaterMarine Biology, 1970