Rapid analysis method for trichloronitromethane as disinfection by-product in drinking water

A trichloronitromethane, rapid analysis technology, applied in the field of municipal water supply and drainage and environmental engineering, can solve the problems of unstable trichloronitromethane, lower accuracy, higher detection limit, etc., to improve recovery rate and enrichment. The effect of set multiples and loss reduction
CN101487773AInactive Publication Date: 2009-07-22TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TONGJI UNIV
Publication Date
2009-07-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for quickly analyzing trichloronitromethane as a disinfection by-product in drinking water, which comprises steps of sample pretreatment, instrument condition control and running measurement; during the sample pretreatment, adjusting pH to range from 4.5 to 5.5; adopting ascorbic acid and ammonium chloride as a chlorination reaction termination agent to facilitate stabilization of the trichloronitromethane; and adopting methyl tertiary butyl ether or ethyl acetate as an extracting agent. The instrument condition control comprises adopting a gas chromatography-mass spectrometer as a main instrument for detecting the trichloronitromethane; controlling the sample feeding amount at 3muL; and controlling the temperature of an introduction port to between 105 and 115 DEG C. The method has the following beneficial effects of reducing loss of the trichloronitromethane greatly, improving reclaiming rate and enrichment multiple of the trichloronitromethane, and revealing stability of the trichloronitromethane under different pH conditions and effect of different common chlorination reaction termination agents on the trichloronitromethane.
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Description

technical field

[0001] The invention belongs to the field of municipal water supply and drainage and environmental engineering, and relates to water quality analysis technology, especially a rapid analysis method for disinfection by-products in drinking water. Background technique

[0002] Disinfection of drinking water began in the early 19th century. At that time, chlorine was used as a disinfectant. It can effectively kill microbial pathogens in water and greatly reduce the chance of people dying from water-borne diseases such as dysentery and cholera caused by drinking water. A major breakthrough in the history of health. However, drinking water disinfection has two sides. While improving water quality and eliminating aquatic diseases, it also produces a series of disinfection by-products (Disinfection by-products, DBPs) that are harmful to humans. Disinfection by-products of drinking water refer to compounds produced by the reaction of disinfectants used for drinking w...

Claims

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