Determination of traces of osmium by the catalysed hydrogen peroxide-cyanocuprate(I) reaction.

@article{Ling1984DeterminationOT,
  title={Determination of traces of osmium by the catalysed hydrogen peroxide-cyanocuprate(I) reaction.},
  author={I N Ling and G. Svehla},
  journal={Talanta},
  year={1984},
  volume={31 1},
  pages={61-7}
}
The reaction between hydrogen peroxide and a mixture of cyanocuprate(I) species at pH 11.2 is selectively catalysed by traces of osmium. With potentiometric or amperometric monitoring, osmium concentrations up to 1 ng ml can be determined, with a lowest determinable concentration of 0.03 ng ml . In the presence of luminol a Landolt-type reaction proceeds and visual or instrumental monitoring of the chemiluminescence can be used. A large number of other cations can be tolerated. The kinetics… CONTINUE READING