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Detection method of inhalable particles PM10 in indoor air

A technology for indoor air and detection methods, which is applied in particle suspension analysis, measurement devices, suspension and porous material analysis, etc., and can solve the problems of unbalanced changes in filter membrane materials

Inactive Publication Date: 2018-04-17
广东信科检测有限公司
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Problems solved by technology

This method has the defect of unbalanced material changes on the filter membrane

Method used

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Embodiment Construction

[0010] In embodiment 1, the present invention comprises A. preparation standard laser detection tube and standard scattering detection tube, and standard laser detection tube and standard scattering detection tube are respectively provided with the intersecting area that has been detected with the air passage of series; Laser scattering light and laser light The intersection area of ​​the source incident light is set in the detected intersection area; the incident light of the two laser sources is respectively perpendicular and parallel to the laser scattering section; B. Collecting ambient gas; C. Detecting the PM10 concentration in the ambient gas; D. Drying Purify the residual air; use the cavity tube to heat, and use the cutter to purify the air and discharge it to the circulation channel; E. Recycle the residual air; Step B is specifically to collect the ambient gas to be detected through the fine particle collector, and treat the ambient gas according to the air condition....

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Abstract

The invention discloses a detection method of inhalable particles PM10 in indoor air to overcome the defects in the prior art. The detection method comprises the following steps: A, preparing a standard laser detection tube and a standard scattering detection tube which are separately provided with detected cross regions with air channels connected in series; the cross regions of laser scattered beams and laser source incident beams are arranged in the detected cross regions; and the incident beams of the two laser sources are separately vertical to and parallel to the laser scattering section; B, collecting environmental gas; C, detecting the PM10 concentration in the environmental gas; D, drying and purifying residual gas; heating the residual gas by means of a cavity tube, and discharging purified air to a circulating channel by means of a cutter; and E, recycling the residual gas. The method is expanded by means of light scattering properties of particles in the environmental gas.The intensity of the detecting scattered light can further detect the concentration of the particles.

Description

technical field [0001] The invention relates to a device in the field of PM10 detection, in particular to a detection method for inhalable particulate matter PM10 in indoor air that detects the intensity of scattered light and can further detect the concentration of particles. Background technique [0002] The most classic method for detecting inhalable particulate matter is the filter membrane method. In the above method, only one inhalable particulate matter cutting head, a pump, a membrane holder and its filter membrane are required. After collecting samples for one day and one hour, remove the filter membrane and weigh it. , if necessary, multiple samples can be collected in parallel, and then weighed after constant temperature and humidity. This method has the defect of unbalanced material changes on the filter membrane. Contents of the invention [0003] In order to overcome the deficiencies in the existing technology, the present invention provides a detection meth...

Claims

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Application Information

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IPC IPC(8): G01N15/06
CPCG01N15/06G01N15/075
Inventor 何文峰李廷标潘存国刘健鹏
Owner 广东信科检测有限公司
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