Determination of microgram amounts of metals by chronometric analysis.
The reaction between peroxidisulphate and iodide, modified by the addition of thiosulphate to show the Landolt effect, has been used for the determination of copper and iron in the range 1-100 mug ml , based on the catalytic effect of these ions. The procedure is rapid and simple, and the errors are less than 10%. The interference from iron in the determination of copper may be overcome by the addition of a masking reagent such as fluoride.
Páll
A
A
Institute for General and Analytical Chemistry of the Technical University, Budapest, Hungary.
Svehla
G
G
Erdey
L
L