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Method used for synchronous detection of eight disinfection by-products including four haloacetonitriles

A technology for synchronous detection of disinfection by-products, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of difficult synchronous measurement of disinfection by-products, complicated pretreatment operations, and difficult characterization, achieving low cost, high accuracy, The effect of high sensitivity

Active Publication Date: 2017-09-22
HOHAI UNIV
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Problems solved by technology

[0004] The above 8 disinfection by-products exist in drinking water at a concentration level of μg / L or even lower, so most of the existing detection methods require enrichment pretreatment, such as sample pretreatment with purge and trap equipment , this pretreatment method requires special equipment, and the pretreatment operation is complicated and costly
At present, the commonly used testing techniques mainly include gas chromatography, and the existing gas-phase detection methods have the problems that it is difficult to simultaneously measure and qualitatively determine the 8 kinds of disinfection by-products

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  • Method used for synchronous detection of eight disinfection by-products including four haloacetonitriles
  • Method used for synchronous detection of eight disinfection by-products including four haloacetonitriles
  • Method used for synchronous detection of eight disinfection by-products including four haloacetonitriles

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[0022] The present invention will be further described below in conjunction with the accompanying drawings. The design ideas of the present invention or simple substitutions of similar substances belong to the protection scope of the present invention. Unless otherwise specified, the experimental methods used below are conventional methods in this technical field, and the ingredients or materials used, unless otherwise specified, are commercially available ingredients or materials.

[0023] A method for simultaneously detecting 8 kinds of disinfection by-products including 4 kinds of haloacetonitriles, comprising the following steps:

[0024] S1: Prepare a series of mixed standard solutions: firstly dilute the mixed standard solution (2000μg / mL) containing 8 kinds of disinfection by-products with MTBE into a concentration of 5, 10, 20, 40, 60, 80μg / L A series of standard liquids;

[0025] S2: setting of chromatographic conditions. The gas chromatograph used is an Agilent 78...

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Abstract

The invention discloses a method used for synchronous detection of eight disinfection by-products including four haloacetonitriles. The method comprises following steps: S1, mixed standard solutions of a series of concentrations are prepared; S2, chromatographic conditions are set; S3, a standard curve is drawn; S4, sample collecting and pretreatment are carried out; and S5, samples obtained in S4 are subjected to detection at the chromatographic conditions set in S2, and a measured peak are value is introduced into the standard curve so as to obtain the corresponding concentration via calculation. The method is high in sensitivity, qualitative capacity, and precision; interference peaks are few; and the method can be used for synchronous detection of a plurality of disinfection by-products in water body in practice.

Description

technical field [0001] The invention relates to a method for synchronously detecting 8 kinds of disinfection by-products including 4 kinds of halogenated acetonitriles, in particular to a method for measuring 4 kinds of halogenated acetonitriles and other 4 kinds of disinfection by-products in drinking water by gas chromatography, which belongs to environmental detection technology field. Background technique [0002] Chlorine and chloramines are widely used to inactivate pathogenic microorganisms in drinking water and sewage treatment plant effluent, but they can react with natural organic matter (NOM) and dissolved organic matter (DOC) in water to form disinfection by-products (DBPs). Haloacetonitriles (HANs) are another large class of disinfection byproducts found in chloraminated water after trihalomethanes (THMs) and haloacetic acids (HAAs) - nitrogenous disinfection byproducts (N-DBPs), which are found in drinking water The production amount of trihalomethanes is gene...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
Inventor 陶辉刘丹赖连花陈卫
Owner HOHAI UNIV
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