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Method for synchronously extracting and analyzing polybrominated diphenyl ether, hydroxyl polybrominated diphenyl ether and methoxy polybrominated diphenyl ether in plants

A technology of hydroxy-polybrominated diphenyl ethers and polybrominated diphenyl ethers, which is applied in the field of extraction and analysis of compounds, can solve the problems of difficult extraction and low content, achieve high sensitivity, improve accuracy, and save extraction time

Active Publication Date: 2021-01-08
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, de-PBDEs, OH-PBDEs and MeO-PBDEs contain many types of monomers, and the content is low, so it is difficult to extract, so there is an urgent need for an efficient and simultaneous extraction method for de-PBDEs, OH-PBDEs and MeO-PBDEs in plants. and analytical methods to improve analytical accuracy and efficiency

Method used

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  • Method for synchronously extracting and analyzing polybrominated diphenyl ether, hydroxyl polybrominated diphenyl ether and methoxy polybrominated diphenyl ether in plants
  • Method for synchronously extracting and analyzing polybrominated diphenyl ether, hydroxyl polybrominated diphenyl ether and methoxy polybrominated diphenyl ether in plants
  • Method for synchronously extracting and analyzing polybrominated diphenyl ether, hydroxyl polybrominated diphenyl ether and methoxy polybrominated diphenyl ether in plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Corn was selected as the plant sample, and the extraction and analysis of polybrominated diphenyl ethers, hydroxy polybrominated diphenyl ethers and methoxy polybrominated diphenyl ethers were carried out according to the following steps. The specific operation steps were as follows:

[0047] 1) Sample processing:

[0048] After crushing the freeze-dried corn roots and aerial part samples to 0.15±0.05cm, add them to ethanol-n-hexane-water solution, wherein the concentration of ethanol is 73wt%, and the concentration of n-hexane is 14wt%. Gradient distillation, in the process of gradient distillation, first heat to 60°C, keep warm for 10min, continue to heat to 70°C, keep warm for 15min, then heat to 80°C, keep warm for 5min, take out the distillate for rectification, heat to 30°C and keep warm for 30min Obtain a rectification sample;

[0049] 2) Sample extraction:

[0050] Weigh 5 mg of the rectified sample, add 1 ml of isopropanol and 2 mL of a mixed solution of n-he...

Embodiment 2

[0084] The method of Example 1 was used to analyze 8 plant samples collected and grown in the polluted soil of an electronic waste dismantling site, and 24 kinds of polybrominated diphenyl ethers (PBDEs) and 12 kinds of hydroxy polybrominated diphenyl ethers (OH-PBDEs) were detected in the plants. and 11 methoxypolybrominated diphenyl ethers (MeO-PBDEs). The PBDEs in plants are mainly mono-BDEs and di-BDEs, the total concentration range of 24 kinds of PBDEs is 6-42ng / g; the total concentration range of 12 kinds of OH-PBDEs in plants is 0.8-3.9ng / g, of which 6 -OH-BDE47 has a high content in plants (0.3-0.9ng / g); in addition, the total concentration range of 11 kinds of MeO-PBDEs in plants is 9-350ng / g, with 6-MeO-BDE85 (8.5-150ng / g) mainly. It shows that the present invention can be actually applied to the detection and analysis of plants, and can simultaneously extract polybrominated diphenyl ethers, hydroxy polybrominated diphenyl ethers and methoxy polybrominated diphenyl...

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Abstract

The invention discloses a method for synchronously extracting and analyzing polybrominated diphenyl ether, hydroxyl polybrominated diphenyl ether and methoxy polybrominated diphenyl ether in plants, and belongs to the field of extraction and analysis of compounds. The method comprises the following steps of: (1) sample treatment; (2) sample extraction; (3) sample purification; (4) sample separation; and (5) sample analysis. Analysis targets in the sample analysis step (5) are a mixed standard containing 39 kinds of polybrominated diphenyl ethers, 12 kinds of hydroxyl polybrominated diphenyl ethers and 12 kinds of methoxy polybrominated diphenyl ethers. According to the method, polybrominated diphenyl ether, hydroxyl polybrominated diphenyl ether and methoxy polybrominated diphenyl ether can be synchronously extracted, volatilization of polybrominated diphenyl ether, hydroxyl polybrominated diphenyl ether and methoxy polybrominated diphenyl ether is reduced, meanwhile, an analysis method is established, and the analysis accuracy is improved.

Description

technical field [0001] The invention relates to the field of extraction and analysis of compounds, in particular to a method for synchronous extraction and analysis of polybrominated diphenyl ethers, hydroxyl polybrominated diphenyl ethers and methoxy polybrominated diphenyl ethers in plants. Background technique [0002] Polybrominated diphenyl ethers (PBDEs) are important brominated flame retardants, which have been widely used in plastics, electrical appliances, furniture, textiles and chemicals due to their high flame retardant efficiency, good thermal stability, and low impact on material properties. field. However, PBDEs have the characteristics of low vapor pressure and strong lipophilicity at room temperature, so they are easily volatilized from products into the atmosphere, and settle to water and soil through the atmospheric drying and wetting process, becoming persistent organic pollutants that are ubiquitous in the environment. PBDEs in environmental media will ...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N30/34G01N30/86
CPCG01N30/02G01N30/06G01N30/34G01N30/8675
Inventor 王森
Owner NORTHWEST UNIV
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