Passive sampling device for sampling long-lasting organic pollutants in atmosphere

A passive sampling device, a technology for organic pollutants, applied in sampling devices, measuring devices, sampling and other directions, can solve the problems of small sampling capacity, easy to achieve saturated adsorption, difficult detection results, etc., achieve large gas flow, improve high carbon A wide range of numerical and linear effects

Inactive Publication Date: 2016-10-26
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the most widely used PUF passive sampler is difficult to separate the adsorbed particles from the collected gas samples. It is difficult to distinguish whether the test results are POPs in the particles or POPs in the gaseous state, and its sampling capacity is small. low) cannot reach the detection limit of the instrument, and cannot be detected; it is easy to reach saturated adsorption, and cannot be li

Method used

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  • Passive sampling device for sampling long-lasting organic pollutants in atmosphere
  • Passive sampling device for sampling long-lasting organic pollutants in atmosphere
  • Passive sampling device for sampling long-lasting organic pollutants in atmosphere

Examples

Experimental program
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Example Embodiment

[0037] Example 1

[0038] A preparation method for passive sampling materials of hexabromocyclododecane and short-chain chlorinated paraffin in the atmosphere, the preparation method comprises the following steps:

[0039] ① Soak the polyurethane foam discs in a mixture of n-hexane and dichloromethane with a volume ratio of 1:1 for 12 hours, extract by ultrasonic for 1 hour, remove the extract, add the above mixture for ultrasonic extraction for 1 hour, remove the extract, repeat 2 times , volatilizing the mixed solution in the polyurethane foam disc to obtain a pretreated polyurethane foam disc.

[0040] ②The pretreated polyurethane foam disc was immersed in a dichloromethane solution with a concentration of 1.143g / L polyethylene glycol 20M. After the dichloromethane was volatilized, it was aged at 50°C for 30min to obtain passive short-chain chlorinated paraffin in the atmosphere. Sampling material, the weight of the polyethylene glycol 20M is 8% of the weight of the polyur...

Example Embodiment

[0041] Example 2

[0042] A passive sampling device for persistent organic pollutants in the atmosphere, the passive sampling device comprises a stainless steel cylinder 1, a stainless steel passive sampling material rack 2, and a stainless steel cylinder cover 3; the cylinder wall and the cylinder bottom of the cylinder 1 are evenly covered with Several holes, the diameter of which is 3 mm, the passive sampling material rack 2 is a through-tube structure, and the bottom of the passive sampling material rack 2 is provided with a cross-shaped stainless steel support 21 to support the passive sampling material prepared in Example 1, so The passive sampling material rack 2 is provided with the passive sampling material prepared in Example 1, the top of the passive sampling material rack 2 is provided with a filter membrane, the passive sampling material rack 2 is provided with hooks 22, and the passive sampling material rack 2 is provided with a hook 22. 2 is suspended in the cyl...

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Abstract

The invention relates to a passive sampling device for sampling long-lasting organic pollutants in the atmosphere, and belongs to the technical field of environmental atmosphere and waste gas monitoring. The passive sampling device comprises a cylinder, a passive sampling material rack, and a cylinder cover. The wall and bottom of the cylinder are both provided with a plurality of holes, which are uniformly arranged. The passive sampling material rack is hung in the cylinder. The top of the passive sampling material rack is provided with a filter membrane. A passive sampling material is arranged in the passive sampling material rack. The top of the cylinder is connected to the cylinder cover. The passive sampling material is prepared by loading polyethylene glycol 20M with a high absorption performance on polyurethane foams, the acting force between the passive sampling material and hexabromocyclododecane/short chain chlorinated paraffin is enhanced therefore; and compared with the conventional polyurethane foam passive sampling device, the provided passive sampling device has the advantages that the sampling capacity is large, the linear range is wide, and the detectable rate of hexabromocyclododecane in a gas phase and short chain chlorinated paraffin with a high carbon number and high chlorinated rate is increased.

Description

technical field [0001] The invention relates to a passive sampling device for persistent organic pollutants in the atmosphere, which belongs to the technical field of ambient atmosphere and waste gas monitoring. Background technique [0002] Persistent organic pollutants (POPs) have attracted global attention because of their refractory environmental persistence, long-distance global transport, bioaccumulation and toxicity (such as carcinogenicity, developmental toxicity, teratogenicity, immunological and reproductive Toxicity, as an endocrine disruptor may cause male feminization, etc.). POPs are often transported across international boundaries by air, water and migratory species and deposited in areas far from their discharge sites, where they subsequently accumulate in terrestrial and aquatic ecosystems. Although the production of certain persistent organic pollutants has been banned, they still exist in the environment and have been detected in water, air, and soil, an...

Claims

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Application Information

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IPC IPC(8): G01N1/22
CPCG01N1/2273
Inventor 朱秀华袁和平陈吉平白浩高媛王炜董学伟
Owner DALIAN JIAOTONG UNIVERSITY
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