Chemistry: electrical and wave energy – Processes and products
Patent
1975-12-31
1977-06-07
Tung, T.
Chemistry: electrical and wave energy
Processes and products
G01N 2746
Patent
active
040281973
ABSTRACT:
A method for the measurement of amounts of free available halogen in solution which is independent of the pH has been developed. The method comprises providing a sensing electrode having a porous conductive component and a reference electrode in a measuring zone, and connecting a potential measuring means between the sensing electrode and the reference electrode. An aqueous solution containing an available halogen is introduced into the measuring zone to contact the sensing electrode and the reference electrode. A pH control solution is passed through at least a portion of the porous conductive component. The free available halogen concentration is measured and indicated on the potential measuring means.
Employing the method, residual amounts of an oxidizing or reducing agent in solution can be continuously measured, independent of the pH of the solution. In addition, the electrode surface is continuously cleansed by the pH control solution. The method of the present invention can be used, for example, to measure the free available chlorine concentration in swimming pool waters.
REFERENCES:
patent: 2414411 (1947-01-01), Marks
patent: 2651612 (1953-09-01), Haller
patent: 2913386 (1959-11-01), Clark
patent: 3756923 (1973-09-01), Dahms
Clements Donald F.
Haglind James B.
O'Day Thomas P.
Olin Corporation
Tung T.
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