Abstract
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 language | English |
---|---|
Pages (from-to) | 15-24 |
Number of pages | 10 |
Journal | Journal of Electroanalytical Chemistry |
Volume | 98 |
Issue number | 1 |
DOIs | |
State | Published - 10 Apr 1979 |
ASJC Scopus subject areas
- Analytical Chemistry
- General Chemical Engineering
- Electrochemistry