Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1994-06-30
1995-06-13
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
2041531, 204401, 204406, 204412, 204415, 204431, 204432, G01N 2726
Patent
active
054239630
ABSTRACT:
A level of a chemical in a fluid is accurately measured by an analyzer having an electrode assembly separated from the fluid by a membrane. The electrode assembly is energized to provide a steady state signal and a pulsed signal, both of which indicate the level of chemical in the fluid, but with only the pulsed signal being substantially unaffected by fouling of the membrane. The pulsed signal and the steady state signal are used to determine a predicted value that the steady state signal will have in the absence of fouling. The predicted value is then used to correct the steady state current to compensate for fouling of the membrane.
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Smart, et al. In Situ Voltammetric Membrane Ozone Electrode, 1979, Analytical Chemistry, vol. 51, No. 14, pp. 2315 to 2319. No month available.
Michael L. Hitchman, Measurement of Dissolved Oxygen, 1978, Zurich, Switzerland, Chapters 4 and 5, pp. 59-123. No month available.
Fletcher Kenneth S.
Ross Bradford E.
Bell Bruce F.
Niebling John
The Foxboro Company
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