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Method for determining hexabromodiphenyl in ambient air

A technology for ambient air and brominated biphenyls, applied in the environmental field, can solve the problems of difficult detection, no standard method for the analysis of hexabromobiphenyl, and few detection methods

Inactive Publication Date: 2021-07-30
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a new type of controlled pollutant, hexabromobiphenyl has attracted worldwide attention to its pollution level in the environment, but there is no standard method for the analysis of hexabromobiphenyl in environmental media
The data on the residue level of hexabromobiphenyl in ambient air is seriously lacking, and the detection of highly toxic hexabromobiphenyl monomer BB-169 is difficult, and there are very few detection methods, so it is urgent to establish effective detection methods

Method used

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  • Method for determining hexabromodiphenyl in ambient air
  • Method for determining hexabromodiphenyl in ambient air
  • Method for determining hexabromodiphenyl in ambient air

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: the selection of extraction solvent

[0036] A method for measuring hexabromobiphenyl in ambient air, the specific steps are as follows:

[0037] S1: Sample preparation:

[0038] The ambient air sampler can collect the hexabromobiphenyl in the solid particle phase and the gas phase respectively. The filter membrane can use glass fiber filter membrane or quartz filter membrane, and the adsorption material can be PUF or XAD-2 resin. The filter membrane used in this embodiment The membrane is a glass fiber filter membrane, and the adsorption material is PUF. The PUF is ultrasonically cleaned 3 times with acetone solution before use to remove impurities. The clean filter membrane and PUF were divided into two groups for comparison test, one group was the blank group, the other group was the standard sample group, and each group was set with three parallels. Add 1mL standard mixed solution to the PUF of the standard sample group with a syringe, in which the c...

Embodiment 2

[0049] Embodiment 2 adds recovery rate test

[0050] A method for measuring hexabromobiphenyl in ambient air, the specific steps are as follows:

[0051] S1: Sample Collection:

[0052] Ambient air samples are continuously collected at the sampling point through an ambient air sampler, and hexabromobiphenyl in the solid particle phase and the gas phase are collected separately through the sampler. The filter membrane can use glass fiber filter membrane or quartz filter membrane, and the adsorption material can be PUF or XAD-2 resin, the filter membrane used in this example is a glass fiber filter membrane, and the adsorption material is PUF. Before use, the PUF is ultrasonically cleaned 3 times with acetone solution for impurity removal. Take the clean filter membrane and PUF, and divide them into three groups of low, medium and high experiments. Each group includes blank samples and spiked samples. Use a syringe to add 1mL standard mixed solution to the PUF in the spiked gro...

Embodiment 3

[0064] Embodiment 3 actual sample detection

[0065] A method for measuring hexabromobiphenyl in ambient air, the specific steps are as follows:

[0066] S1: Sample collection:

[0067] Ambient air samples are continuously collected at Nanjing Gaochun sampling point through an ambient air sampler, and hexabromobiphenyl in the solid particle phase and gas phase are collected through the sampler respectively. The filter membrane can use glass fiber filter membrane or quartz filter membrane, and the adsorption material can be PUF or XAD-2 resin, the filter membrane used in this example is a glass fiber filter membrane, the adsorption material is PUF, and the PUF is ultrasonically cleaned 3 times with acetone solution before use to remove impurities.

[0068] S2: Sample pretreatment:

[0069] Put the filter membrane and PUF in the extraction pool, and use the accelerated solvent extraction instrument to extract the sample. The extraction solvent is n-hexane:dichloromethane (1:1)...

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Abstract

The invention provides a method for determining hexabromodiphenyl in ambient air. Two kinds of hexabromodiphenyl in the ambient air are detected at the same time by combining accelerated solvent extraction with gas chromatography. The method comprises the following steps: (1) sample collection: continuously collecting ambient air samples at sampling points by adopting a novel ambient air sampler; (2) extracting hexabromodiphenyl in the sample by adopting an accelerated solvent extractor; (3) purifying a target object by using a solid-phase extraction small column; and (4) detecting the two hexabromobiphenyls in the sample by using a gas chromatographic method, and performing quantifying by using an external standard method. According to the method, two hexabromodiphenyl monomers are selected for an ambient air medium for the first time, and an air sample pretreatment method and a gas chromatography detection and analysis method are established.

Description

technical field [0001] The invention relates to the field of environment, in particular to a method for determining hexabromobiphenyl in ambient air Background technique [0002] Hexabromobiphenyl (Hexabromobiphenyl) is a class of polybrominated biphenyls with 6 bromine substituents. Polybrominated biphenyls have the characteristics of good chemical inertness, high thermal stability, and good flame retardancy. They have been widely used as flame retardants in various materials such as plastics, textiles, electronic appliances, and home building materials. The United States began to produce commercial PBBs in 1970, the main products being FireMaster BP-6 and Firemaster FF-1. The main component of FireMaster BP-6 is hexabrominated monomer BB-153 (2,2',4,4',5,5'-hexabrominated biphenyl), accounting for about 53.9%-68.0% of the total. In terms of toxicity, the planar hexabrominated monomer BB-169 (3,3',4,4',5,5'-hexabrominated biphenyl) is the most toxic in many biological sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06G01N30/70
CPCG01N30/06G01N30/70
Inventor 梁梦园王蕾范德玲古文刘济宁
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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