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Sampler for brominated flame retardants in indoor air and sampling and measuring method thereof

A brominated flame retardant, indoor air technology, applied in the field of analysis and detection, can solve problems such as pollution, target compound loss background, cumbersome process, etc.

Active Publication Date: 2020-10-20
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, currently existing small-flow samplers are generally based on PUF and XAD-4 resin fillers to enrich samples. Solvent-consuming methods such as Soxhlet extraction, pressurized solvent extraction, or ultrasonic extraction are used to extract the brominated barriers adsorbed in the resin fillers. The fuel is extracted, and then purified and eluted through the SPE column (solid phase extraction column) before the nitrogen blowing concentration and sample detection can be carried out. This sampling method is cumbersome, and it is easy to cause the loss of the target compound or the introduction of the background. Pollution

Method used

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  • Sampler for brominated flame retardants in indoor air and sampling and measuring method thereof
  • Sampler for brominated flame retardants in indoor air and sampling and measuring method thereof
  • Sampler for brominated flame retardants in indoor air and sampling and measuring method thereof

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Experimental program
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Effect test

Embodiment 1

[0062] (1) Sample collection

[0063] The sampler for brominated flame retardants is composed of a solid-phase extraction column, a flow meter (range 0-25L / min), and a diaphragm vacuum pump (maximum pumping rate 20L / min) sequentially connected through a silicone tube. The structure is as follows: figure 1 shown. Among them, there are two solid-phase extraction columns connected in parallel. Each column has an inner diameter of 12.8mm, an outer diameter of 14.7mm, and a height of 68mm; each column is filled with 250mg CNWBOND HC-C18 filler and 250mg CNWBOND NH 2 Filler (filler particle size is 40 ~ 63μm, average pore size Ion exchange capacity 1.6meq / g), the two fillers are not mixed with each other, separated by glass fiber sieve plate, CNWBOND HC-C18 filler is on the upper layer, CNWBOND NH 2 The padding is on the lower layer.

[0064] Air samples were collected in 3 different rooms of the same hotel. Before sample collection, activate the solid-phase extraction column w...

Embodiment 2

[0076] (1) Sample collection

[0077] Sampler is the same as embodiment 1.

[0078] Air sample collection was performed in 4 different dormitories in the same dormitory building. Before sample collection, activate the solid-phase extraction column with 4mL methanol, 4mL ethyl acetate, 4mL methylene chloride, and 4mL n-hexane in sequence, wrap it in aluminum foil and seal it in a polypropylene bag for storage, and then carry it to the sampling site. The sampling device is placed at a height of 1.2m from the ground, the sampling rate is about 4.0L / min, and the sample collection time is 8h. After the sampling was completed, the solid-phase extraction column was still wrapped in aluminum foil, sealed in a polypropylene bag, transported back to the laboratory as soon as possible, and stored in a -20°C refrigerator until processing.

[0079] (2) Sample processing

[0080] Before the elution of the solid-phase extraction cartridge, 5 ng of polybrominated diphenyl ethers (PBDEs) in...

Embodiment 3

[0091] (1) Sample collection

[0092] Sampler is the same as embodiment 1.

[0093] Air sampling was performed in 3 different rooms within the same household. Before sample collection, activate the solid-phase extraction column with 4mL methanol, 4mL ethyl acetate, 4mL methylene chloride, and 4mL n-hexane in sequence, wrap it in aluminum foil and seal it in a polypropylene bag for storage, and then carry it to the sampling site. The sampling device is placed at a height of 1.2m from the ground, the sampling rate is about 4.0L / min, and the sample collection time is 8h. After the sampling was completed, the solid-phase extraction column was still wrapped in aluminum foil, sealed in a polypropylene bag, transported back to the laboratory as soon as possible, and stored in a -20°C refrigerator until processing.

[0094] (2) Sample processing

[0095] Before the elution of the solid-phase extraction cartridge, 5 ng of polybrominated diphenyl ethers (PBDEs) internal standard and ...

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Abstract

The invention provides a sampler for brominated flame retardants in indoor air and a sampling and measuring method thereof, and relates to the technical field of analysis and detection. The sampler provided by the invention comprises a plurality of small solid-phase extraction columns connected in parallel, a flow meter connected with the outlets of the small solid-phase extraction columns, and adiaphragm vacuum pump connected with the outlet of the flow meter. The small solid-phase extraction columns are filled with filler, the filler comprises upper-layer CNWBOND HC-C18 filler and lower-layer CNWBOND NH2 filler, and the filler is separated by glass fiber sieve plates. According to the sampler disclosed by the invention, traditional and novel brominated flame retardants in air are directly enriched by the solid-phase extraction columns, the eluent can be directly subjected to nitrogen blowing concentration and then subjected to sample injection detection, the steps of solvent extraction and purification in a traditional sampling mode are omitted while the sampling requirements of different types of indoor environments are met, solvent consumption is remarkably reduced, the sampling process is simplified, and interference of uncertain factors on sampling measurement results is reduced.

Description

technical field [0001] The invention relates to the technical field of analysis and detection, in particular to a sampler for brominated flame retardants in indoor air and a method for sampling and measuring the same. Background technique [0002] Traditional (legacy) and novel (novel) brominated flame retardants (brominated flame retardants, BFRs), as one of the most common flame retardant additives, are widely used in people's daily necessities. With the widespread detection of brominated flame retardants (BFRs) in the atmosphere, more and more studies have been conducted on their distribution in environmental media and their physiological toxicity. [0003] At present, the collection of BFRs in atmospheric samples mainly adopts large flow and low flow active sampling and passive sampling. The large-flow active sampler uses PUF (poly-urethane foam, polyurethane foam) and XAD-4 (polystyrene-type ion exchange resin) fillers as enrichment media, and is widely used in the col...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24G01N30/06G01N30/08G01N30/02
CPCG01N1/2214G01N1/2273G01N1/24G01N30/02G01N30/06G01N30/08G01N2030/027G01N2030/045G01N2030/062G01N2030/085
Inventor 姚义鸣王永越杨晓萌张清刘昱喆肖鸿燕孙红文
Owner NANKAI UNIV
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