Active carbon box sampler with diffusion barrier

A technology of activated carbon box and sampler, applied in the direction of sampling device, can solve problems such as restricting use, and achieve the effects of improving efficiency, simple operation and saving manpower

Active Publication Date: 2014-07-16
GUANGZHOU TESTING CENTRE OF CONSTRUCTION QUALITY AND SAFETY CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

These shortcomings restrict its use in sampling environments with high ambient humidity

Method used

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  • Active carbon box sampler with diffusion barrier
  • Active carbon box sampler with diffusion barrier
  • Active carbon box sampler with diffusion barrier

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specific Embodiment

[0026] Installation method of the present invention can be expressed as follows:

[0027] 1. Packing of activated carbon: bake the activated carbon 20 at 120°C for more than 12 hours, weigh 80g and put it into the aluminum box 10, spread the surface of the activated carbon 20 with a spoon, put it into the stainless steel mesh 30, and then install the sticky diffuser The stainless steel pressing sheet 40 of base 41, install the snap ring 50 that is used for positioning then, after covering, seal aluminum box 10 with adhesive tape, and number.

[0028] 2. Deploy the activated carbon sampler: tear off the tape in the sampling room, open the cover 11 and record the sampling start time (accurate to the minute, record the year, month, day, hour and minute).

[0029] 3. Recover the activated carbon sampler: when the specified sampling time is reached, seal the carbon box with adhesive tape after the cover is closed, and record the end sampling time (accurate to the minute).

[0030]...

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Abstract

The invention discloses an active carbon box sampler with a diffusion barrier, which comprises a circular aluminum cover with a cover, the diffusion barrier, a stainless steel pressing sheet, a stainless steel net, a location snap ring and active carbon, wherein the active carbon is arranged in the aluminum box, the stainless steel net is placed on the active carbon, and the stainless steel pressing sheet provided with the diffusion barrier is placed on the stainless steel net and is located by the location snap ring and then sealed by the cover. In the invention, the sampling efficiency is increased through selecting the active carbon with high radon adsorption efficiency, the influence of water in the air to a detection result is reduced through additionally arranging the diffusion barrier and changing the structure of the sample, and reverse diffusion of radon is reduced; and the concentration of the radon in a room is detected by using the sampler disclosed by the invention, thus the reliability of the detection result is improved. The sampler is suitable for massively detecting the radon in the room for a current construction project, and has the advantages of stable detection result, simplicity in operation, saving of a great quantity of manpower works, and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an active carbon cumulative sampler for detecting radon concentration in indoor air, in particular to an active carbon box sampler with a diffusion barrier. Background technique [0002] At present, the activated carbon box used to measure the radon concentration in indoor air requires a sampling time of 48±0.5h. The reason is that when the sampling time increases, the water absorption of the activated carbon box is too high, so that the response coefficient to radon is no longer stable at its scale. In terms of coefficients, it shows that the test results are unstable. When the humidity of the sampling environment is high, the deviation of the measurement result of the software is greater than the standard requirement value of ±25%. These shortcomings restrict its use in sampling environments with high ambient humidity. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/22
Inventor 梅爱华丘寿康刘小松何小军盘文坚汤小平黄翠华
Owner GUANGZHOU TESTING CENTRE OF CONSTRUCTION QUALITY AND SAFETY CO LTD
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