Use of potassium iodide as a chemical actinometer.

  title={Use of potassium iodide as a chemical actinometer.},
  author={Ronald O. Rahn},
  journal={Photochemistry and photobiology},
  volume={58 6},
Aqueous solutions of KI were examined for use as chemical actinometers to measure 254 nm (germicidal) radiation. Irradiation results in electron ejection from iodide such that aqueous electrons and iodine atoms are formed. In the presence of N2O, an electron scavenger, recombination of these two reactive species is eliminated and stoichiometric formation of triiodide occurs. The absorbance increase due to triiodide was followed and the quantum yield determined using either a radiometer or… CONTINUE READING

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