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Passive sampler for polycyclic aromatic hydrocarbon in indoor air and sampling testing method thereof

A passive sampler, polycyclic aromatic hydrocarbon technology, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of expensive production and transportation, long analysis time, cumbersome operation, etc., and achieve simple production and operation, simple cleaning, The effect of good application prospects

Inactive Publication Date: 2012-11-21
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The object of the present invention is to overcome the deficiencies in the prior art for passive samplers for polycyclic aromatic hydrocarbons in indoor air, such as complex structure, expensive manufacturing and transportation costs, cumbersome operation and long analysis time, and provide a kind of passive sampler for polycyclic aromatic hydrocarbons in indoor air. A passive sampler for cycloaromatic hydrocarbons and a method for sampling and measuring the same, the present invention is designed for the actual needs of measuring the concentration of polycyclic aromatic hydrocarbons in the current indoor air, and has the advantages of portability, convenient operation and low price

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  • Passive sampler for polycyclic aromatic hydrocarbon in indoor air and sampling testing method thereof
  • Passive sampler for polycyclic aromatic hydrocarbon in indoor air and sampling testing method thereof
  • Passive sampler for polycyclic aromatic hydrocarbon in indoor air and sampling testing method thereof

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Embodiment 1

[0050] A specific sampling and determination method for the determination of polycyclic aromatic hydrocarbons by a passive sampler for polycyclic aromatic hydrocarbons in indoor air of the present embodiment is as follows:

[0051] i) Cleaning of the adsorbent:

[0052] Before sampling, the granular Carbotrap B adsorbent was ultrasonically cleaned with chromatographically pure methanol, dichloromethane, and acetone in sequence, and then placed in a muffle furnace for 6 h at 400 °C. Finally, it was sealed and stored in a pre- Put it into a desiccator with pure nitrogen, seal it after cooling and store it at 0°C until use;

[0053] ii) Sampling process:

[0054] In a certain residence A, cover the mouth of the sampling bottle 1 containing the adsorbent cleaned in step i) with a wire mesh cover, and buckle it upside down at the round hole 3 on the upper layer of the sampling rack 2 to keep each sample The surface of the adsorbent in the bottle 1 is flush, and the entire passive...

Embodiment 2

[0077] In summary, a passive sampler for polycyclic aromatic hydrocarbons in indoor air of the present invention is simple to manufacture and assemble, and the price is low, and the extraction of polycyclic aromatic hydrocarbons in the adsorbent only needs to be completed by accelerated solvent extraction, which is greatly improved. It reduces the use of organic solvents and shortens the analysis time, is suitable for passive sampling of polycyclic aromatic hydrocarbons in indoor air, and can also monitor high-ring PAHs, and has a good application prospect.

[0078] The above schematically describes the present invention and its implementation, which is not restrictive, and what is shown in the drawings is only one of the implementations of the present invention, and the actual structure is not limited thereto. Therefore, if a person of ordinary skill in the art is inspired by it, without departing from the inventive concept of the present invention, without creatively designin...

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Abstract

The invention discloses a passive sampler for polycyclic aromatic hydrocarbon in indoor air and a sampling testing method thereof and belongs to the fields of sampling and determining of the polycyclic aromatic hydrocarbon. The sampler comprises a sampling bottle and a sampling support, the sampling bottle is filled with granular CarbotrapB or XAD-4 resin which serves as an adsorbent, and the sampling support is a double-layer metal support. Sampling testing steps comprise washing adsorbent; inversely placing the sampling bottle filled with the adsorbent at the position of a circular hole of the upper layer of the sampling support for sampling; extracting the polycyclic aromatic hydrocarbon in the adsorbent; determining quality Mg, i of 15 kinds of PAHs obtained by sampling of the passive sampler through gas-mass chromatography; determining sample rate through fitted line slope fitted by Veq-t; and calculating mean concentration Cg, i of the polycyclic aromatic hydrocarbon in the indoor air. The passive sampler is simple in manufacture and assembly and low in cost, only uses accelerated solvent extraction to extract the polycyclic aromatic hydrocarbon in the adsorbent, greatly reduces use of organic solvent, shortens analysis time and is applicable to sampling of the polycyclic aromatic hydrocarbon in the indoor air.

Description

technical field [0001] The invention belongs to the technical field of sampling and measuring polycyclic aromatic hydrocarbons, and more specifically relates to a passive sampler for polycyclic aromatic hydrocarbons in indoor air and a sampling and measuring method thereof. Background technique [0002] Polycyclic aromatic hydrocarbons (PAHs) are important pollutants in the air and have a wide range of sources. The monitoring of their concentrations is of great significance for health risk assessment. PAHs mainly exist in 2-4 rings in indoor air, such as naphthalene, phenanthrene, pyrene and fluoranthene, which account for 80-95% in the gas phase at 20°C, and they are used as markers to indicate PAHs pollution and human exposure. more appropriate. Lu et al. (Environmental Pollution, 2008, 152(3): 569-575) analyzed PAHs in the indoor air of public places in Hangzhou, China through sampling and found that PAHs accounted for 98% in the gas phase and less than 2% in particulate...

Claims

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Application Information

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IPC IPC(8): G01N1/22G01N30/06G01N30/88
Inventor 鲜啟鸣黄茜李婷禹甸胡冠九
Owner NANJING UNIV
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