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Volatile organic gas diffusion sampling tube

A volatile organic and gas diffusion technology, applied in sampling devices and other directions, can solve the problems of large volume, inconvenient carrying, troublesome operation, etc., and achieve the effect of small volume, convenient carrying and simple operation

Inactive Publication Date: 2015-03-25
GUANGDONG HANWEI DETECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It needs power supply and air extraction power device, which is bulky, cumbersome to operate, and inconvenient to carry

Method used

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  • Volatile organic gas diffusion sampling tube
  • Volatile organic gas diffusion sampling tube
  • Volatile organic gas diffusion sampling tube

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Embodiment Construction

[0017] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] Such as Figure 1-2 As shown, a volatile organic gas diffusion sampling tube of the present invention includes a diffusion tube 1 with a microporous structure. The diffusion tube 1 is made of high-temperature materials by extrusion and sintering. The diffusion tube 1 is filled with an adsorbent 2 to absorb The agent 2 adopts granular carbon airgel or coconut shell activated carbon adsorbent medium with a particle size of 30-50 meshes. The two sides of the diffusion tube 1 are respectively provided with stoppers 3 for fixing the filler in the tube, and the stoppers 3 are deactivated....

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Abstract

The invention discloses a volatile organic gas diffusion sampling tube. The volatile organic gas diffusion sampling tube is characterized by comprising a diffusion tube with a micropore structure, wherein an adsorbent is filled in the diffusion tube; baffle blocks for fixing filler in the tube are respectively arranged at the two sides in the diffusion tube; and end openings in the two ends of the diffusion tube are respectively covered by tube caps. Compared with the drive type sampler, power supply and gas exhausting device are not needed, so that the volatile organic gas diffusion sampling tube is small in size, light in weight, simple to operate, convenient to carry, safe, suitable for various environments, and especially suitable for time weighted average concentration detection of personal exposure dose in environmental health and occupational health as well as sampling in a flammable and combustible limited environment.

Description

technical field [0001] The invention relates to a gas sampling device, which belongs to the fields of occupational hygiene and environmental protection and a non-powered diffusion type sampling tube for detecting volatile organic pollutants in indoor air. Background technique [0002] Diffusion passive samplers can be widely used in the absorption and capture of various organic pollutants such as benzene, toluene, n-hexane, and formaldehyde in ambient air and occupational health workplace air. At this stage, environmental protection monitoring agencies, research institutes, occupational health, large chemical companies, etc. have a large demand for diffusion samplers, and the usage is about 700,000 per year. Domestic research and development and production of this type of products are still limited. In the blank stage, only products from the United States, the Netherlands and other countries can be purchased. [0003] At present, active air samplers are usually used for gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22
Inventor 王自成
Owner GUANGDONG HANWEI DETECTION TECH
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