Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample
Patent
1990-06-14
1992-03-10
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing liquid or solid sample
210175, 21032175, 2103218, 422 8205, 422 8209, 422101, 422256, 436124, 436125, 436126, 436178, G01N 2164, G01N 3352, G01N 118, B01D 6300
Patent
active
050948172
ABSTRACT:
An apparatus for quantitative determination of trihalomethanes comprises a separation unit containing two channels in contact with each other via a microporous membrane that will not react with trihalomethanes, a reaction unit for heating a carrier solution that has passed through the separation unit, a cooling unit for cooling the carrier solution that has undergone complete reaction; and a detection unit for determining the quantity of a fluorescent substance in the carrier solution. A method for quantitative determination of trihalomethanes comprises flowing a sample solution or a mixture thereof with a reducing agent through one of the two channels in the separation unit, flowing the carrier solution through the other channel, heating the carrier solution that has passed through the separation unit and to which an alkaline nicotinamide or a derivative thereof has been added, cooling the carrier solution, and subjecting the cooled solution to fluorimetry.
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patent: 4929562 (1990-05-01), Anderson et al.
Okumura, K. et al., "Fluorimetric Determination of Chloroform in Drinking Water", Analysis, vol. 1, pp. 1498-1502, Dec. 1982.
Aoki Toyoaki
Hoshikawa Hiroshi
Kawakami Kouji
Tanaka Yoshiharu
Fuji Electric & Co., Ltd.
Soderquist Arlen
Warden Robert J.
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