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Method for detecting polar phenol type chlorinated/brominated disinfection by-products in water

A technology for disinfection by-products and phenols, which is used in measurement devices, instruments, scientific instruments, etc., can solve the problem of high detection limit and quantification limit, inability to use trace amounts of polar phenol-based chlorinated/brominated disinfection by-products, Time-consuming and other problems, to achieve high sensitivity, improve reproducibility and recovery, and reduce errors

Inactive Publication Date: 2016-11-16
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

In this patented technology, there was developed an effective way to detect small quantities of chemical compounds that may be harmful or dangerous at low concentrations like nitrophenols. By continuously analyzing samples containing these substances, it becomes possible to identify their presence accurately even when they exist only very slightly below what would normally indicate them. It also allows for precise measurement over time without any significant changes being made due to factors such as temperature fluctuation. Overall, this technology provides valuable tools for environmental monitoring purposes while minimizing potential health hazards associated with exposure thereto.

Problems solved by technology

This patented technical problem addressed in this patent relates to developing an effective way to accurately measure small molecular weight compounds called polyarthrites or polyphenols contained within liquor containing organics like dichroinsulfonate monochlorobutaneously without being affected negatively by other substances present in the sample solution.

Method used

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  • Method for detecting polar phenol type chlorinated/brominated disinfection by-products in water
  • Method for detecting polar phenol type chlorinated/brominated disinfection by-products in water
  • Method for detecting polar phenol type chlorinated/brominated disinfection by-products in water

Examples

Experimental program
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Embodiment 1

[0037] figure 1 It shows that the technical scheme of the present invention can simultaneously realize the separation and detection of 13 novel polar phenolic chlorinated / brominated disinfection by-products at one time. Its concrete method comprises the following steps:

[0038] 1) Prepare different concentration gradients (10 -12 g / L-10 -6 g / L) containing 3,5-dichloro-4-hydroxybenzaldehyde, 3-bromo-5-chloro-4-hydroxybenzaldehyde, 3,5-dibromo-4-hydroxybenzaldehyde, 3,5- Dichloro-4-hydroxybenzoic acid, 3-bromo-5-chloro-4-hydroxybenzoic acid (by volume), 3,5-dibromo-4-hydroxybenzoic acid, 3,5-dichlorosalicylic acid , 3-bromo-5-chlorosalicylic acid, 3,5-dibromosalicylic acid, 2,4,6-trichlorophenol, 2,6-dichloro-4-bromophenol, 2,6-dibromo Standard working solution of -4-chlorophenol and 2,4,6-tribromophenol. Wherein, 3-bromo-5-chloro-4-hydroxybenzoic acid has no available standard substance, thus according to literature (Pan, Y., Zhang, X., 2013.Four groups of new aromatic ha...

Embodiment 2

[0054] In Example 2, one or more substances in the 13 novel polar phenolic chlorinated / brominated disinfection by-products were measured simultaneously using the technical solution of the present invention. Its concrete method comprises the following steps:

[0055] Step 1) preparation of standard working solutions with different concentration gradients, 2) preparation of the water samples to be tested, and step 3) pretreatment of the water samples to be tested, are the same as those described in Example 1.

[0056] In step 4), the 13 kinds of phenolic chlorinated / brominated disinfection by-products were randomly combined, that is, one or more of the 13 phenolic chlorinated / brominated disinfection by-products were combined, divided into Times (2-12 times) are detected by the detection method of the present invention. The parameter settings of the established ultra-high performance liquid chromatography / electrospray ionization triple quadrupole mass spectrometer (UPLC / ESI-tqMS...

Embodiment 3

[0061] In Example 3, the detection method of the present invention was used to separate and detect 13 novel polar phenolic chlorinated / brominated disinfection by-products contained in the water produced by the waterworks. Its concrete method comprises the following steps:

[0062] 1) The method for preparing standard working solutions with different concentration gradients is the same as that described in Example 1.

[0063] 2) Collect 1L of fresh factory water, and quickly transport the water samples back to the laboratory under refrigerated conditions at 4°C.

[0064] 3) Take 100 mL of the water sample in 2) and titrate the residual chlorine content in the water, and then add 5% sodium arsenite in excess molar ratio to the remaining 0.9 L water sample to terminate the reaction. Use H again 2 SO 4 Adjust the pH to 0.5. Add 90 g Na per liter of acidified sample 2 SO 4 Make it saturated, then add 90mL methyl tert-butyl ether for extraction, place it for 15min and then use...

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Abstract

The invention provides a method for detecting polar phenol type chlorinated/brominated disinfection by-products in water. The method comprises steps as follows: 1) standard working solutions of 13 polar phenol type chlorinated/brominated disinfection by-products required to be detected are prepared; 2) a to-be-detected water sample is acidized, salted out, subjected to continuous liquid-liquid extraction, separated, concentrated, filtered and pretreated in other modes; 3) analysis is performed by means of a UPLC/ESI-tqMS (ultra-high performance liquid chromatography/electrospray ionization-triple quadrupole mass spectrometer): mass spectrum parameters, liquid chromatography parameters and gradient elution process parameters of the UPLC/ESI-tqMS are established; 4) a calibration curve is drawn and the concentration is calculated after a chromatographic peak of a chromatogram sample is preliminarily determined to be identical to that of a known standard substance and the chromatogram sample and the known standard substance are the same substance. The detection method is high in sensitivity, precision and accuracy, can achieve the purpose of rapidly and efficiently measuring the 13 polar phenol type chlorinated/brominated disinfection by-products in the water, particularly can rapidly and efficiently detect a trace quantity of polar phenol type chlorinated/brominated disinfection by-products in the water, and has relatively high practical value.

Description

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Claims

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Application Information

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Owner NANJING UNIV
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