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A detection method for disinfection by-products of halogenated pyridinium alcohols in water

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, good separation effect and high-efficiency extraction effect

Active Publication Date: 2021-05-11
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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  • A detection method for disinfection by-products of halogenated pyridinium alcohols in water
  • A detection method for disinfection by-products of halogenated pyridinium alcohols in water
  • A detection method for disinfection by-products of halogenated pyridinium alcohols in water

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Experimental program
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Effect test

Embodiment 1

[0056]The detection method of halogenic pyridinic disinfection by-product is used in a hydraulic pyridol-TQMS, i.e., ultra-high-efficiency liquid chromatography / electrospray ionization triple quadrupole mass spectrometry, such asfigure 1 As shown, including the following steps:

[0057]S100, water sample pretreatment: use h2SO4One or more of the NaOH or phosphate buffer, adjusting the water sample pH 3-4, adjusting the pH object to make the polar nitrogen-containing disinfection by-product in the water sample, easier to enter the organic phase It is more easily extracted; anhydrous sodium sulfate is added to the magnetic stirrer, and the mixed solution is added to the separatory funnel, and the extractant is added to the separatory funnel, the extractant is a methyl tert-butyl ether; shake the oscillation After 15 min, take the upper extractant solution, after the low-pressure rotary evaporation instrument is concentrated, the acetonitrile solution is added to the acetonitrile soluti...

Embodiment 2

[0096]The basic content of the present embodiment is in the same embodiment, and the difference is that the mass spectrum parameters are shown in Table 5.

[0097]table 5

[0098]

[0099]The test results show that the effects produced after optimization are similar to those of Example 1, so that eight halogenated pyridine disinfection by-products achieve good separation effects during the analysis process, and is substantially the same as in Example 1.

Embodiment 3

[0101]The basic content of the present embodiment is in the same embodiment, and the difference is that the mass spectrum parameters are shown in Table 6.

[0102]Table 6

[0103]

[0104]The test results show that the effects produced after optimization are similar to those of Example 1, so that eight halogenated pyridine disinfection by-products achieve good separation effects during the analysis process, and is substantially the same as in Example 1.

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Abstract

The invention provides a method for detecting disinfection by-products of halogenated pyridine alcohols in water bodies, belonging to the technical fields of municipal water supply and drainage and environmental engineering. Firstly, the water sample is pretreated, and the pH of the water sample is adjusted to 3-4 during the pretreatment process to obtain the solution to be tested; then, the liquid chromatography-mass spectrometry technology is used to detect the disinfection side effects of halogenated pyridine alcohols in the solution to be tested. Product; establish the working curve of the disinfection by-products of the halogenated pyridinium alcohols, and obtain the spectrum of the substance to be tested, and calculate the concentration of the disinfection by-products of the halogenated pyridinium alcohols by using the external standard method. The detection method of the present invention optimizes the pretreatment method of liquid-liquid extraction, improves the recovery rate of disinfection by-products of halogenated pyridine alcohols; Monitoring and subsequent control of disinfection by-products provides a reliable detection method.

Description

Technical field[0001]The present invention belongs to the field of environmental engineering, and more particularly to detecting methods of halogenated pyridinoid disinfection by-products in a water body.Background technique[0002]Disinfecting as the last barrier for drinking water treatment processes, effectively inactivating pathogen microorganisms in the water, avoiding the explosion of waterborne diseases such as cold, cholera, dysentery, and guarantee the safety of water supply. However, after the process of condensation and precipitation, there is still a certain amount of natural organic matter, inorganic ion, microbulin, and a series of chemical reactions in the disinfectant, and produce halogenic disinfection by-products. Epidemiology and toxicological study show that there is a significant positive correlation between halogenic disinfection by-products with three characteristics and incidence of multiple cancers, pregnant women spontaneously abortion, and infant birth defec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88G01N30/06G01N30/34G01N30/72
CPCG01N30/06G01N30/34G01N30/72G01N30/88G01N2030/047G01N2030/062G01N2030/8845
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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