title: Determination of microgram amounts of metals by chronometric analysis.
abstract: 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.
authors.affiliation: Institute for General and Analytical Chemistry of the Technical University, Budapest, Hungary.
authors.forename: A
authors.initials: A
authors.lastname: Páll
authors.forename: G
authors.initials: G
authors.lastname: Svehla
authors.forename: L
authors.initials: L
authors.lastname: Erdey