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Method for detecting halogenated pyridinol disinfection by-products in water body

A technology of disinfection by-products and halogenated pyridines, which is applied in the field of environmental engineering, can solve the problems of inability to detect low-concentration halogenated pyridine alcohols disinfection by-products, etc., and achieve the effects of optimized detection parameters, high extraction efficiency, and high-efficiency extraction effect

Active Publication Date: 2020-06-30
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the prior art cannot detect low-concentration halogenated pyridine alcohol disinfection by-products in water, the present invention provides a detection method for halogenated pyridine alcohol disinfection by-products in an environment with a pH of 3-4 Pretreat the water samples, optimize the operating parameters of the instrument and establish the working curve of the substance to be tested, so as to detect the low concentration of halogenated pyridinium alcohol disinfection by-products in the water body

Method used

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  • Method for detecting halogenated pyridinol disinfection by-products in water body
  • Method for detecting halogenated pyridinol disinfection by-products in water body

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Embodiment 1

[0056] The detection method of the halogenated pyridine alcohols disinfection by-products in a water body of the present invention uses UPLC / ESI-tqMS, that is, an ultra-high performance liquid chromatography / electrospray ionization triple quadrupole mass spectrometer to detect the substance to be tested, such as figure 1 shown, including the following steps:

[0057] S100, water sample pretreatment: use H 2 SO 4 , NaOH or one or more of phosphate buffers, adjust the pH of the water sample to 3-4, the purpose of adjusting the pH is to make the polar nitrogen-containing disinfection by-products in the water sample electrically neutral and more likely to enter the organic phase so that It is easier to be extracted; add anhydrous sodium sulfate on the magnetic stirrer, add the mixed solution to the separatory funnel after stirring, and then add the extractant to the separatory funnel, the extractant is methyl tert-butyl ether; Place for 15 minutes, take the upper layer extractan...

Embodiment 2

[0096] The basic content of this embodiment is the same as that of Embodiment 1, except that the mass spectrometry parameters are shown in Table 5.

[0097] table 5

[0098]

[0099] The detection results show that the effect produced after optimization is similar to that of Example 1, so that eight kinds of halogenated pyridyl alcohol disinfection by-products all achieve good separation effects in the analysis process, basically the same as Example 1.

Embodiment 3

[0101] The basic content of this embodiment is the same as that of Embodiment 1, except that the mass spectrometry parameters are shown in Table 6.

[0102] Table 6

[0103]

[0104] The detection results show that the effect produced after optimization is similar to that of Example 1, so that eight kinds of halogenated pyridyl alcohol disinfection by-products all achieve good separation effects in the analysis process, basically the same as Example 1.

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Abstract

The invention provides a method for detecting halogenated pyridinol disinfection by-products in a water body, and belongs to the technical field of municipal water supply and drainage and environmental engineering. The method comprises the following steps: pretreating a water sample, and adjusting the pH value of the water sample to 3-4 in the pretreatment process to obtain a solution to be detected; then, detecting halogenated pyridinol disinfection by-products in the solution to be detected by adopting a liquid chromatography-mass spectrometry technology; and establishing a working curve ofthe halogenated pyridinol disinfection by-products, obtaining a map of the substance to be detected, and calculating the concentration of the halogenated pyridinol disinfection by-products by adoptingan external standard method. According to the detection method disclosed by the invention, a pretreatment method of liquid-liquid extraction is optimized, and the recovery rate of halogenated pyridinol disinfection byproducts is increased; the liquid chromatography-mass spectrometry method is optimized, a relatively low detection limit is obtained, and a reliable detection method is provided formonitoring and subsequent control of halogenated pyridinol disinfection byproducts in a water body.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a method for detecting disinfection by-products of halogenated pyridine alcohols in water bodies. Background technique [0002] Disinfection, as the last barrier of the drinking water treatment process, can effectively inactivate pathogenic microorganisms in the water body, avoid the outbreak of typhoid, cholera, dysentery and other water-borne diseases, and ensure the safety of water supply. However, after the source water has been treated by coagulation, precipitation and other processes, there are still a certain amount of natural organic matter, inorganic ions, micro-pollutants, etc., which will undergo a series of chemical reactions with disinfectants to form halogenated disinfection by-products. Epidemiological and toxicological studies have shown that halogenated disinfection by-products have three characteristics and are significantly positiv...

Claims

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Application Information

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IPC IPC(8): G01N30/88G01N30/06G01N30/34G01N30/72
CPCG01N30/88G01N30/06G01N30/34G01N30/72G01N2030/8845G01N2030/062G01N2030/047
Inventor 潘旸汤海洋钟红利姚志建周庆李爱民张丹谭索
Owner NANJING UNIV
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