Chemistry: analytical and immunological testing – Halogen containing
Patent
1989-01-30
1990-10-02
Warden, Robert J.
Chemistry: analytical and immunological testing
Halogen containing
436125, 436126, 436172, 436175, 436178, 436 52, 436 53, 210661, 210663, 210668, 210753, 210754, G01N 3318, G01N 100, C02F 142, C02F 176
Patent
active
049607111
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.
REFERENCES:
patent: 4243525 (1981-01-01), Greenberg
patent: 4385996 (1983-05-01), McCarthy
patent: 4693832 (1987-09-01), Hurst
Rook, Johannes J., "Haloforms in Drinking Water", Journal of the AWWA, Mar. 1976, pp. 168-172.
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.
Vassilatos Thalia P.
Warden Robert J.
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