Halogen analysis by membrane covered polarographic sensors

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


A membrane covered polarographic sensor was found to be sensitive to dissolved molecular and hydrated halogens. Sensitivity to a given species was found to be dependent on the composition of the membrane. Solid plastic membranes are permeable to dissolved molecular halogens: polyethylene to Cl2(aq) and silicone rubber to I2(aq). Sensors with a microporous membrane are sensitive to both molecular halogens and associated acids (HOCl and HOBr). The sensitivity threshold for a sensor with a 0.8 mm2 cathode was found to be better than 1 ppm. A senor with a dialysis membrane was successfully used to implement an automatic controller for maintaining a constant level of free available chlorine or free available bromine in swimming pool waters.

Original languageEnglish
Pages (from-to)15-24
Number of pages10
JournalJournal of Electroanalytical Chemistry
Issue number1
StatePublished - 10 Apr 1979

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering (all)
  • Electrochemistry


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