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Method and device for thermal desorption fast self-help detection of formaldehyde

A technology of thermal desorption and formaldehyde, applied in the field of indoor air pollution detection and control, can solve the problems of short microwave time, long time, complicated operation, etc., and achieve the effect of reducing time and increasing release speed

Inactive Publication Date: 2009-11-25
王岚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The desiccator method takes 24 hours, the environmental chamber method takes 7 days, and the perforation extraction method is costly, complicated to operate, and requires the use of toxic toluene
In short, the above method uses many reagents and instruments, is costly, complicated to operate, and takes a long time, so it is not suitable for family and personal self-service testing.
The patent (200610054157.8) provides a method for microwave detection of formaldehyde, which has many equipment and reagents, and the operation is very complicated, and it is not suitable for home and personal self-service detection
At the same time, this method also has a microwave time is too short, the uncertainty of detection is too large

Method used

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  • Method and device for thermal desorption fast self-help detection of formaldehyde
  • Method and device for thermal desorption fast self-help detection of formaldehyde
  • Method and device for thermal desorption fast self-help detection of formaldehyde

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Experimental program
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Effect test

Embodiment 1

[0037] Embodiment 1: connect part 1, part 2 and part 6 (without part 3, part 4 and part 5), detect the formaldehyde content in the box made of veneer, and the measured result formaldehyde concentration is 0.36mg / m 3 . Then we use the arbitration method (GB / T 18204.26-2000) phenol reagent spectrophotometry to measure the concentration of 0.33mg / m 3 . The relative error of the two detection methods was 9%. Less than the 25% requirement stipulated by the state.

Embodiment 2

[0038] Embodiment 2: use the same five-ply board, be divided into twelve pieces of the same area, get three pieces, and use the thermal desorption method of the present invention to measure and calculate as follows after the data: 2.39, 2.62, 2.29. The average value is 2.43, and then the data measured by the dryer method required by the national standard is as follows: 2.87. The error of the two is 15.3%, and the uncertainty is within 25%.

Embodiment 3

[0039] Embodiment 3: There is a new office, equipped with the same manufacturer, desks produced by the same batch of materials, in order to better manage, get 3, then use the thermal desorption method of the present invention to carry out rapid detection, measure The data are as follows: 0.86, 0.72, 0.92. The mean value is 0.83, and the relative error is 12.5%, meeting the requirements.

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Abstract

The invention relates to the field of room air pollution detection and treatment, in particular to a method and a device\ which are suitable for families and individuals to conveniently and fast detect the formaldehyde pollution source of a room in a self-help mode so as to achieve the purposes of fastness, convenience and reliability through heating the surface of a formaldehyde pollution source to 80 DEG C and reducing manual operation factors. The detection system is shown in an attached figure 1 and comprises six parts: an air extracting pump without adjusting, a high-precision ratio long formaldehyde detecting tube, a heat-insulation and heat-preservation detecting box, an automatic temperature control thermal desorption heating plate, a detected artificial plate and a product thereof and a silica gel connecting pipe, wherein the structure of the temperature automatic control thermal desorption heating plate is shown in an attached figure 2 and characterized by ensuring that detected surface is automatically controlled at 80 DEG C.

Description

Technical field: [0001] The invention relates to the field of indoor air pollution detection and treatment, and is a simple and fast method and device for self-checking the surface release degree of indoor formaldehyde pollution sources (wood-based panels, furniture, walls, etc.). Background technique: [0002] In order to improve the effect of indoor air pollution control, it is necessary to detect the formaldehyde content before, during and after the treatment. If a professional company with CMA qualification is invited to test, the cost is high, the time is slow, and it is difficult to popularize and promote. If families and individuals want to self-check and control indoor air pollution, they lack simple and easy techniques and methods. At present, formaldehyde pollution in the living room mainly comes from wood-based panels and their products. However, according to national standards, the detection of wood-based panels and their products mainly uses the dryer method, ...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N1/24
Inventor 王岚
Owner 王岚