Journal of Analytical Chemistry

, Volume 55, Issue 5, pp 454–456 | Cite as

Redox-potentiometric determination of polyethylene glycol-20 000 by its reaction with iodine

  • N. N. Golovnev
  • A. I. Andreev
  • O. S. Romanova
  • O. N. Andronova


A simple and rapid procedure for the potentiometric determination of polyethylene glycol with a molecular mass of 20000 (PEG-20000) was proposed. The procedure is based on the empirically found stoichiometry of the reaction of PEG-20000 precipitation with iodine. Titration was performed to a constant potential of the I 3 /3I−1 redox couple measured with a platinum electrode. The relative standard deviation for PEG-20000 concentrations from 6.0 to 19.9 g/L was ≤5%.


Iodine Polyethylene Glycol Redox Couple Constant Potential Iodine Solution 
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Copyright information

© MAIK “Nauka/Interperiodica” 2000

Authors and Affiliations

  • N. N. Golovnev
    • 1
  • A. I. Andreev
    • 1
  • O. S. Romanova
    • 1
  • O. N. Andronova
    • 1
  1. 1.Department of ChemistryKrasnoyarsk State UniversityKrasnoyarskRussia

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