Online fast method for detecting active bromated phenoxy radical in environment

A technology of bromophenoxy free radicals and detection of the environment, which is applied in the direction of chemical reaction analysis of materials, chemiluminescence/bioluminescence, material excitation analysis, etc., to achieve the effect of simple and fast methods

Inactive Publication Date: 2015-01-28
DALIAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

These research results theoretically prove the formation of bromophenoxy radicals in the environment, however, the methodological research on its direct capture and characterization by experiments has not been reported yet

Method used

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  • Online fast method for detecting active bromated phenoxy radical in environment
  • Online fast method for detecting active bromated phenoxy radical in environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Prepare a phosphate buffer solution of 2.6-dibromophenol with a concentration of 10mM / L, add 1ml of the configured solution to the sample cell, and use Buker's electron paramagnetic resonance (EPR) and a high-resolution microwave cavity to pass through the connection. Use the UV-online excitation-induced reaction system to detect bromophenoxy radicals online, and compare the data with parameters such as modulation amplitude, modulation frequency, sweep width, time constant, field scanning rate, and microwave power through multiple injections , After optimizing to obtain the optimal peak shape, determine the final parameters, in which the microwave energy is 15.1mW, and the gain value (G) is 5.02*10 4 , the modulation frequency is 100kHz, the modulation amplitude is 1.00GHz, the time constant is 163.84msec, and the sweep width is 26GHz.

[0026] The obtained bromophenoxy radical EPR spectra were qualitatively analyzed.

[0027] (1) Use Winsim software to fit the EPR spe...

Embodiment 2

[0033] Prepare an aqueous solution of 2.6-dibromophenol at a concentration of 10mM L -1 , add 1mL of the prepared solution to the sample cell, and add 1M L -1 50 μL of the DMPO capture agent, using Buker’s electron paramagnetic resonance (EPR) and high-resolution microwave resonator, combined with the UV-online excitation-induced reaction system to detect bromophenoxy radicals online, through multiple injections , tuning amplitude, tuning frequency, time constant, scanning rate, microwave power and other parameters. After comparing and optimizing the data to obtain the optimal peak shape, determine the corresponding parameters, where the microwave energy is 10.13mW, and the gain value is 5.02*10 4, the modulation frequency is 100kHz, the modulation amplitude is 0.8G, the time constant is 163.84msec, and the sweep width is 120GHz

[0034] The obtained carbon-centered radical EPR spectra were qualitatively analyzed.

[0035] (1) Use Winsim software to fit the EPR spectrum of t...

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Abstract

The invention discloses an online fast method for detecting active bromated phenoxy radicals in the environment, and belongs to the field of environment oriented analysis. Bromated phenoxy free radicals are thought to be an important intermediate for oxidation formation of bromated aromatic ring compounds in the environment, and have certain scientific significance to the discussion of the sources and forming mechanism of some persistent organic pollutants in the environment such as hydroxyl polybrominated diphenyl ethers and brominated dioxins. The invention adopts on-line ultraviolet induced photochemical reaction, establishes an analysis method for rapid capture of transient bromated phenoxy free radicals, and can also determine the generation amount of bromated phenoxy free radicals. The constructed detection method has good repeatability and reliability, and verification of different compounds confirms the accuracy and usability of the method.

Description

technical field [0001] The invention relates to an online rapid detection method for bromophenoxy radicals, which belongs to the technical field of environmental analysis, and in particular to an online rapid detection method for active bromophenoxy radicals in the environment. Background technique [0002] With the development of industrial society, more and more halogen-containing (mainly chlorine and bromine) organic compounds have entered various environmental media (such as air, water, soil) in large quantities. Because these halogenated compounds may pose a serious threat to human health and the ecological environment, they have attracted more and more attention. As typical emerging brominated environmental pollutants, hydroxypolybrominated diphenyl ethers (HO-PBDEs) and polybrominated dibenzodioxins / furans (PBDD / Fs) have three effects (carcinogenic, teratogenic, Toxicological hazards such as mutagenicity), thyroid hormone interference effects, and neurological and re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/76G01N21/63
Inventor 赵洪霞姜菁秋王燕丽谭峰陈景文全燮
Owner DALIAN UNIV OF TECH
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