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Quick analysis method for PBDEs (polybrominated diphenyl ethers)

A polybrominated diphenyl ether, rapid analysis technology, applied in the field of environmental analysis, can solve the problems of expensive instruments and high processing requirements

Inactive Publication Date: 2015-12-09
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

At present, the commonly used PBDEs detection methods include gas chromatography, liquid chromatography, and chromatography-mass spectrometry. The instruments used in these methods are expensive and have high requirements for sample pretreatment.

Method used

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  • Quick analysis method for PBDEs (polybrominated diphenyl ethers)
  • Quick analysis method for PBDEs (polybrominated diphenyl ethers)
  • Quick analysis method for PBDEs (polybrominated diphenyl ethers)

Examples

Experimental program
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Embodiment 1

[0020] Example 1 Preparation of gold solid substrate: Weigh 5g of yeast powder and place it in the inner container of the reaction kettle, wash it with acetone and pour off the supernatant, and add 50mL of 3% glutaraldehyde and 10mL of 2% chloroauric acid to the inner container in turn . After mixing evenly, react in a vacuum oven at 200° C. for 12 hours. The supernatant of the product was poured out, and the lower layer of solid was placed in a crucible, and calcined in a muffle furnace at 600° C. for 7 hours to grind the calcined product into fine particles to obtain a gold solid substrate supported by a carbon skeleton.

[0021] Example 2 Enrichment and detection of BDE-47: Weigh 5 mg of a gold solid substrate supported by a carbon skeleton and place it on a silicon wafer, add 15 μL of BDE-47 solution onto the surface of the substrate dropwise, use a portable Raman spectrometer for signal acquisition, and use a laser The wavelength is 785nm, and the scanning time is 5s, an...

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Abstract

The invention provides a gold solid substrate synthesized with a high-temperature method and supported by a carbon skeleton, PBDEs (polybrominated diphenyl ethers) are adsorbed on the surface of the substrate, and Raman characteristic peaks of BDE-47 (2,2',4,4'-tetrabromodiphenyl ether) are observed through a portable Raman spectrometer. A series of experiments prove that a sample preparation method and a target pollutant analysis method are simple and convenient to operate, and PBDEs in an environment substrate can be quickly detected.

Description

technical field [0001] The invention belongs to the field of environmental analysis, and in particular relates to an analysis method of polybrominated diphenyl ethers. technical background [0002] In 1974, Fleischmann et al. first discovered that the Raman signal intensity of pyridine molecules was greatly enhanced when they were adsorbed on the surface of an electrochemically rough Ag electrode. They attribute the observed enhancement to the larger adsorption area of ​​the roughened Ag electrode surface, which leads to an increase in the number of adsorbed pyridine molecules. In 1977, VanDuyne et al. and Creighton et al. repeated the above experiments independently, and found through theoretical calculations that the Raman scattering spectrum generated by the pyridine molecules adsorbed on the surface of the silver electrode increased by 10% compared with the normal Raman spectrum intensity. 4 ~10 6 times. VanDuyne et al. defined this Raman signal enhancement phenomenon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
Inventor 景传勇杜晶晶
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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