Instrument for measurement of the organic carbon content of...

Details Instrument for measurement of the organic carbon content of... Instrument for measurement of the organic carbon content of...

G - Physics

01

N

324/26

G01N 33/18 (2006.01) G01N 27/06 (2006.01)

Patent

CA 1234183

Abstract of the Disclosure Apparatus and methods for measurement of total organic carbon content of water, particularly of low relative organic content, is described which features a single sample cell for exposure of a static sample to ultraviolet radiation comprising electrodes for measuring the conductivity of the water. The conductivity is monitored as a function of time and the second time derivative of the conductivity signal is monitored to indicate when the oxidation reaction has been completed. Compensation for the contribution to conductivity of the water sample made by the instrument is achieved by subtracting a quantity porportional to the first time derivative of the conductivity at a time when the second time derivative reaches zero, indicating that the oxidation reaction is complete, from the change in the total conductivity measurement, the remainder being equal to the contribution to conductivity made by oxidation of the organic content of the water.

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