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A passive sampler for gaseous polycyclic aromatic hydrocarbons in the root box experiment and its sampling and determination method

A passive sampler, polycyclic aromatic hydrocarbon technology, applied in chemical instruments and methods, instruments, sampling, etc., can solve the problems of complex structure of atmospheric passive sampler, expensive manufacturing and transportation costs, long analysis time, etc., and achieve fast sampling speed. , the production and operation are simple, the effect of simplifying the extraction process

Inactive Publication Date: 2019-01-01
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These mainly include: whether it is domestic or foreign technology, whether it has extended functions or not, atmospheric passive samplers have the disadvantages of complex structure, expensive production and transportation costs, cumbersome operation and long analysis time

Method used

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  • A passive sampler for gaseous polycyclic aromatic hydrocarbons in the root box experiment and its sampling and determination method
  • A passive sampler for gaseous polycyclic aromatic hydrocarbons in the root box experiment and its sampling and determination method
  • A passive sampler for gaseous polycyclic aromatic hydrocarbons in the root box experiment and its sampling and determination method

Examples

Experimental program
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Effect test

Embodiment 1

[0052] A passive sampler for gaseous polycyclic aromatic hydrocarbons in a root box experiment, comprising a root box and some gas collectors, the gas collectors are suspended in different positions in the root box and used to collect the gas at different positions in the root box, The gas collector is a SPE solid-phase extraction column tube with a volume of 5mL. Granular XAD-2 resin is housed in the gas collector as an adsorbent. The particle diameter of the adsorbent is 20 mesh and the surface area is 430m 2 / g, the water content is 20%, and the adsorbent in each collector is 1.0g. The root box is provided with a cover, and the cover is provided with a round hole for fixing the gas collector.

[0053] The gas collector is a colorless SPE column tube with a diameter of 1 cm and a height of 6 cm. When the gas collector is suspended in the root box, the small opening of the column tube is upward.

[0054]The gas collector includes an adsorbent and two porous polytetrafluoroeth...

Embodiment 2

[0056] A passive sampler for gaseous polycyclic aromatic hydrocarbons in a root box experiment, comprising a root box and some gas collectors, the gas collectors are suspended in different positions in the root box and used to collect the gas at different positions in the root box, The gas collector is a SPE solid phase extraction column tube with a volume of 10mL. Granular XAD-2 resin is housed in the gas collector as an adsorbent. The particle diameter of the adsorbent is 60 mesh and the surface area is 460m 2 / g, the water content is 45%, and the adsorbent in each collector is 1.0g. The root box is provided with a cover, and the cover is provided with a round hole for fixing the gas collector.

[0057] The gas collector is a colorless SPE column tube with a diameter of 2 cm and a height of 7 cm. When the gas collector is suspended in the root box, the small opening of the column tube is upward.

[0058] The gas collector includes an adsorbent and two porous polytetrafluoroe...

Embodiment 3

[0060] A passive sampler for gaseous polycyclic aromatic hydrocarbons in a root box experiment, comprising a root box and some gas collectors, the gas collectors are suspended in different positions in the root box and used to collect the gas at different positions in the root box, Described gas collector is the SPE solid-phase extraction column tube that volume is 8mL, and granular XAD-2 resin is housed in described gas collector as adsorbent, and the particle diameter of adsorbent is 40 mesh, and surface area is 470m 2 / g, the water content is 35%, and the adsorbent in each collector is 1.0g. The root box is provided with a cover, and the cover is provided with a round hole for fixing the gas collector.

[0061] The gas collector is a colorless SPE column tube with a diameter of 1.5 cm and a height of 6.5 cm. When the gas collector is suspended in the root box, the small opening of the column tube is upward.

[0062] The gas collector includes an adsorbent and two porous pol...

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Abstract

The invention discloses a passive sampler for gaseous polycyclic aromatic hydrocarbon in a root box experiment. The passive sampler comprises a root box and a plurality of gas collectors, wherein the gas collectors are used for collecting the gases on different positions in the root box; SPE solid phase extraction column tubes with volume being 5-10ml are taken as the gas collectors; granular XAD-2 resins are contained in the gas collectors as the absorbents; the absorbents are characterized by having grain size of 20-60 meshes, superficial areas of more than or equal to 430m<2> / g and moisture content of 20%-45%; the dosage of the absorbents is 1.0g per gas collector. The invention also discloses a sample determining method for the passive sampler for the gaseous polycyclic aromatic hydrocarbon in the root box experiment. The passive sampler provided by the invention is simple in manufacturing and assembling and low in cost; the absorbents need not be separated from the gas collectors; the extraction for the polycyclic aromatic hydrocarbon can be finished by directly eluting, so that the usage of the organic solvent is greatly reduced and the analysis time is shortened, and meanwhile, the PAHs loss in the sample collection and transferring process is also reduced; the sampling rate is greatly increased; the passive sampler is fit for the passive sampling for the gaseous polycyclic aromatic hydrocarbon in the outdoor experimental root box or outdoor experiment.

Description

technical field [0001] The invention relates to the technical field of sampling and determination of polycyclic aromatic hydrocarbons, in particular to a passive sampler for gaseous polycyclic aromatic hydrocarbons in a root box experiment and a sampling and determination method thereof. Background technique [0002] Polycyclic aromatic hydrocarbons (PAHs) are important persistent organic pollutants (POPs) in the atmosphere. Flue gas from complete combustion and exhaust from automobiles, petrochemical and gas plants, etc. Polycyclic aromatic hydrocarbons (PAHs), as a kind of combustion by-products, are widely distributed in the environment. Some of them have been proved to have carcinogenic, teratogenic and mutagenic effects. They not only cause great pollution to the environment, but also cause long-term inhalation. Such toxic and harmful pollutants and eating food contaminated by such substances will cause great harm to human health. This chronic exposure to PAHs has car...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/26G01N30/88B01J20/281
CPCG01N1/2214G01N1/26G01N30/482G01N30/88
Inventor 赵振华曹晶晶史文梅张芸芸候锦超
Owner HOHAI UNIV
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