Rapid analysis method of disinfection side product dibromo-acetonitrile in drinking water

Abstract

A rapid analysis method of dibromo-acetonitrile comprises sample pre-treatment, instrument condition control and operation measurement. The method is specifically characterized in that in the sample pre-treatment process, adjusting the pH in a range of 4.5-5.0, using any one of ascorbic acid, sodium thiosulfate, sodium sulphite and ammonium chloride as a chlorination reaction termination agent, using any one of methyl tertiary butyl ether, ethyl acetate, normal hexane and normal pentane as an extraction agent, using a gas chromatography-mass spectrum instrument as a main instrument for detecting DBAN, controlling the sample size to be 3 microlitres, and controlling the temperature at the feeding opening at 110-130 DEG C. The analysis method of the invention improves the pre-treatment method of liquid-liquid extraction, establishes a high-efficiency extraction method, and improves recovery rate and enrichment times of the DBAN. The analysis technique can be widely applied to detection of yielding water in large, medium and small feed water treatment plants, to water quality security check for drinking water production units of bottled water and barrelled water, and to the industries with special water quality requirements and water drinking hygienic monitoring and investigation department.

Description

technical field [0001] The invention belongs to the field of municipal water supply and drainage and environmental engineering, and relates to water quality detection and analysis technology. 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 water disinfection with some natural organic matter (Nature Organic Ma...

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Problems solved by technology

[0008] my country's new "Drinking Water Hygienic Standards" (GB 5749-2006) stipulates that drinking water contains 0.05-4.0mg/L residual chlorine (Cl 2 ), before determining DBAN, Cl 2 eliminated to avoid its impact on DBAN (Cl 2 Oxidation of DBAN), it is necessary to add a chlorination reaction ter

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