Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample
Patent
1980-03-05
1982-08-17
Marcus, Michael S.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing liquid or solid sample
250435, 422 64, 422 81, 422 78, 23230PC, G01N 3112, G01N 2163
Patent
active
043449182
ABSTRACT:
An apparatus for determining total carbon in each one of a plurality of discrete liquid samples comprises a reactor (13), and a pump (12) and flowline (11) for maintaining a continuous flow of a liquid containing an oxidizing agent into the reactor (13). The liquid samples are introduced in succession into the reactor (13), either by means of a syringe injection port (19) in the flowline (11), or by means of a rotary valve (203) and sample loop (204) in a recirculation line (202) through which carbon-free liquid is withdrawn from and circulated back to the reactor (13). A mercury vapor lamp (17) is immersed in the liquid in the reactor (13) for irradiating the liquid sample and the oxidizing agent in the reactor (13) with ultraviolet energy in order to oxidize to carbon dioxide any carbonaceous matter in the liquid sample. A sparger (20) is provided to remove the carbon dioxide so produced from the reactor (13); and a carbon dioxide detector (24) is provided to measure the carbon dioxide produced as a result of the oxidation of carbonaceous matter in the reactor (13). Electronic integrator circuitry (25) provides a measure of total carbon present in the carbon dioxide produced in the time interval during which carbonaceous matter in each liquid sample is being oxidized.
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Goulden et al., Anal. Chem. vol. 47, No. 12, Oct. 1975, pp. 1943-1946, Automated Det. of Dissolved Organic Carbon in Lake Water.
Takahashi, Ultra Low Level TOC Analysis of Potable Waters, 1976.
Marcus Michael S.
Xertex Corporation
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