Chemistry: analytical and immunological testing – Carbon containing
Patent
1984-07-27
1986-10-28
Chin, Peter
Chemistry: analytical and immunological testing
Carbon containing
436146, 422 78, 422 79, 422 80, G01N 3300
Patent
active
046199020
ABSTRACT:
An 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.
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patent: 4401763 (1983-08-01), Itoh
Baldwin and McAtee, "Determination of Organic Carbon in Water with a Silver-Catalyzed Peroxydisulfate Wet Chemical Oxidation Method", 19 Microchem. J. 179 (1974).
Osburn and Werkman, "Determination of Carbon in Fermented Liquors", Ind. and Eng. Chem. 421 (1932).
Menzel and Vaccaro, "The Measurement of Dissolved Organic and Particulate Carbon in Seawater", 9 Limnol. Oceanogra. 138 (1964).
Goulden and Brooksbank, "Automated Determinations of Dissolved Organic Carbon in Lake Water", Anal. Chem. 1943 (1975).
Chin Peter
O.I. Corporation
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