Total organic carbon analyzer
Patent 4619902 Issued on October 28, 1986. Estimated Expiration Date: 
July 27, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 27, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3784359 3864088 Analytical method and apparatus for determination of total nitrogen and/or carbon contents in aqueous systems Analytical method for the determination of nitrogen, carbon, hydrogen and sulfur or chlorine and apparatus therefor Patent #: 4401763 InventorApplicationNo. 06/635147 filed on 07/27/1984US Classes:436/145, CARBON CONTAINING422/78, Including means for pyrolysis, combustion, or oxidation422/79, Biological, chemical, or total oxygen demand (i.e., BOD, COD, TOD)422/80, And means directly analyzing evolved gas436/146In an aqueous solution (e.g., TOC, etc.)ExaminersPrimary: Chin, PeterAttorney, Agent or FirmInternational ClassesG01N 33/18 (20060101)G01N 31/00 (20060101) AbstractAn improved digestion chamber (10) is provided for use in a carbon analysis system. A catalyst (16), selected from the platinum metals group consisting of platinum, rhodium, palladium, osmium, iridium and ruthenium, provides an oxidizing surface for the sample being analyzed. The oxidant (26) is preferably persulfate, which may be stored in a generally stable solution until needed for sample oxidation. The catalyst (16) may be provided as a digestion chamber wire insert, such as a rod or as a plating on the chamber walls, enabling an increased variety of materials to be used for the vessel. In a preferred embodiment of the digestion chamber, polytetrafluoroethylene is used to reduce the background carbon which must be corrected in the analysis.Other References
Field of SearchCARBON CONTAINING |
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