Guest
I am currently looking for a polymer film/membrane to use in a chlorine sensing electrode. The material must allow chlorine in solution to permeate through in the form of free available chlorine (HOCl) and total residual chlorine (chloroamines, HOCl et al.). It does not matter if other species will be able to permeate through, but minimal water permeation is mandatory!! The electrode would be used in industrial, in-line application and may be subject to high temperatures and pressures. I have already tried a number of polymer films (nylon, PVC, polyimide, polycarbonate, polysulphone) that have failed to read chlorine. I have a suspicion that it is because these films are hydrophobic therefore not allowing any solution permeation whatsoever. Right now I am considering teflon PTFE due to chlorine's abaility to permeate through it with minimal water absorption and its resistance to chlorine oxidative attack. ANY info/suggestions is appreciated!!!<br>mlovin