The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 1986
Filed:
Jan. 10, 1984
Frederick K Blades, Boulder, CO (US);
Richard D Godec, Erie, CO (US);
Anatel Instrument Corporation, Boulder, CO (US);
Abstract
Apparatus and methods for measurements 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 sample to ultraviolet radiation comprising electrodes for measuring the resistivity 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 resistivity at a time when the second time derivative reaches zero, indicating that the oxidation reaction is complete, from the overall conductivity measurement, the remainder being equal to the contribution of conductivity made by the organic content to the water.