Method and apparatus for reagentless measurement of the total or

Details Method and apparatus for reagentless measurement of the total or Method and apparatus for reagentless measurement of the total or

1993-07-12

1995-05-09

Housel, James C.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing liquid or solid sample

436146, 210758, 96 6, 95 45, G01N 3300

Patent

active

054137632

ABSTRACT:
A method and apparatus for the measurement of the total organic carbon (TOC) content of a liquid is shown. The inorganic carbon in the liquid is converted into carbon dioxide and removed from it. At the same time, oxygen is added to the liquid. The liquid is then exposed to ultraviolet radiation and the organic carbon thereby oxidized. This oxidized carbon, in the form of carbon dioxide, is allowed to migrate across a gas-permeable, liquid-impermeable membrane directly into a measurement chamber, where its absorption of radiation is measured to determine its concentration.

REFERENCES:
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patent: 5244478 (1993-09-01), Jolly
patent: 5271900 (1993-12-01), Morita
Godec, Kosenka, Hutte; New Total Organic Carbon Analyzer; SAE Technical Paper Series, #901354; Jul. 9-12, 1990.
Jeffers, Novotny; Process Control Water Quality Monitor for Space Station Freedom-Development Update; SAE Technical Paper Series, #921264; Jul. 13-16, 1992.
Ultrapure Water Expo 1992, pp 53-59; May 11-13, 1992.
Jolly, Jeffers; Ultrapure Water Total Organic Carbon Analyzer-Advanced Component Development; SAE Technical Paper Series, #911436; Jul. 15-18, 1991.
Jeffers, Jolly; Development of the Process Control Water Quality Monitor for Space Station Freedom; SAE Technical Paper Series, #911432; Jul. 15-18, 1991.

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