A sampler for brominated flame retardants in indoor air and its sampling and determination method

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

Active Publication Date: 2021-05-07
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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  • A sampler for brominated flame retardants in indoor air and its sampling and determination method
  • A sampler for brominated flame retardants in indoor air and its sampling and determination method
  • A sampler for brominated flame retardants in indoor air and its sampling and determination method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062](1) sample collection

[0063]The sampler of the bromo-flame retardant is subjected to a solid phase extraction column, a flow meter (Rules 0 to 25 L / min), the diaphragm vacuum pump (maximum pumping rate 20 L / min), is sequentially connected by silicone tubes,figure 1 Indicated. Among them, the solid phase extraction strip has two, parallel, each pillar having an inner diameter of 12.8 mm, an outer diameter of 14.7mm, a height of 68mm; each pillar is filled with 250 mgcnwbond HC-C18 filler and 250mg cnWbond NH2The filler (the particle size of the filler is 40 ~ 63μm, the aperture)Ion exchange capacity 1.6Meq / g), the two fillers are not mixed, and there is a glass fiber sieve plate, and the CNWBOND HC-C18 filler is located on the upper layer, CNWBond NH.2The filler is located in the lower layer.

[0064]Air sample collection in three different rooms in the same hotel. Pre-use of 4 mL of methanol, 4 ml of ethyl acetate, 4 ml of dichloromethane, 4 ml of n-hexane, and sealed in the...

Embodiment 2

[0076](1) sample collection

[0077]The sampler is in Example 1.

[0078]Air sample collection is performed in 4 different dorms of the same dormitory. Pre-use of 4 mL of methanol, 4 ml of ethyl acetate, 4 ml of dichloromethane, 4 ml of n-hexane, and sealed in the polypropylene bag and sealed in the polypropylene bag and sealed in the polypropylene bag. The sampling device is placed at a height from the ground 1.2m, the sampling rate is about 4.0 l / min, and the sample collection time is 8h. After the sample is completed, the solid phase extraction strip is still wrapped in aluminum foil, sealed in the polypropylene bag, transported back to the laboratory as soon as possible, stored in the refrigerator of -20 ° C, to be treated.

[0079](2) Sample treatment

[0080]Before the solid phase extraction column was eluted, 5 ng of polyabrominated phenyl ether (PBDES) inner standard and 5 ng of brominated flame retardant (NBFRS) in the small column filler, wherein the polyabiniphenyl ether isaped (no...

Embodiment 3

[0091](1) sample collection

[0092]The sampler is in Example 1.

[0093]Air sample collection in three different rooms in the same family room. Pre-use of 4 mL of methanol, 4 ml of ethyl acetate, 4 ml of dichloromethane, 4 ml of n-hexane, and sealed in the polypropylene bag and sealed in the polypropylene bag and sealed in the polypropylene bag. The sampling device is placed at a height from the ground 1.2m, the sampling rate is about 4.0 l / min, and the sample collection time is 8h. After the sample is completed, the solid phase extraction strip is still wrapped in aluminum foil, sealed in the polypropylene bag, transported back to the laboratory as soon as possible, stored in the refrigerator of -20 ° C, to be treated.

[0094](2) Sample treatment

[0095]Before the solid phase extraction column was eluted, 5 ng of polyabrominated phenyl ether (PBDES) inner standard and 5 ng of brominated flame retardant (NBFRS) in the small column filler, wherein the polyabiniphenyl ether isaped (non-mass)...

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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 present invention includes: several solid-phase extraction columns in parallel, all filled with fillers in the solid-phase extraction columns, and the fillers include the upper CNWBOND HC-C18 filler and the lower CNWBOND NH 2 Packing, the packing is separated by glass fiber sieve plates; a flow meter connected to the parallel outlet of the solid phase extraction column; a diaphragm vacuum pump connected to the outlet of the flow meter. The sampler of the present invention uses a solid phase extraction column to directly enrich traditional and new brominated flame retardants in the air, and the eluent can be directly concentrated by nitrogen blowing and then injected for detection, meeting the sampling requirements of different types of indoor environments At the same time, the solvent extraction and purification steps in the traditional sampling method are omitted, the solvent consumption is significantly reduced, the sampling process is simplified, and the interference of uncertain factors on the sampling and measurement results is reduced.

Description

Technical field[0001]The present invention relates to the field of analysis and detection, and more particularly to a sampler of brominated flame retardant in indoor air and a sample and measurement method thereof.Background technique[0002]Legacy and new (Novel) brominated flame retardants (BFRS) are one of the most common flame retardant additives, in a large number of daily necessities. As the bromine flame retardant (BFRS) is widely detected in the atmosphere environment, the distribution in the environmental medium and its physiological toxicity have become more and more.[0003]At present, the collection of BFRs in atmosphere mainly uses large flow and small flow active sampling and passive sampling. Large-flow active sampler utilizes PUF (poly-urethane foam, polyurethane foam) and XAD-4 (polystyrene ion exchange resin) fillers as an enriched medium, is widely used in the collection of outdoor low concentration atmosphere, large volume, It costs more energy, usually poor portabil...

Claims

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Application Information

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Patent Type & Authority Patents(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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