Method for measuring suspension particles in air

Abstract

A particle trap is mounted on an aircraft, and traps suspended particulate matter contained in the atmosphere in such a manner that the suspended particulate matter is charged with unipolar ions generated by a discharge electrode, and thereby The charged particles are adsorbed to a collecting electrode having a potential difference with respect to the discharge electrode, whereby the particles are trapped by the collecting electrode. The particle trap is transported to an arbitrary altitude and driven so as to trap suspended particulate matter contained in the atmosphere at the arbitrary altitude. Recover the particle trap to the ground for various measurement operations, or carry out various measurement operations on the particulate matter thus trapped by the aircraft.

Description

technical field [0001] The invention relates to a method for determining suspended particulate matter present in the atmosphere. Background technique [0002] Suspended particulate matter (SPM) is defined as suspended particles in the atmosphere that are less than 10 microns in diameter. Although this suspended particulate matter contains rolled up soil, it mainly consists of black smoke, unburned fuel, and sulfur compounds. In the Kanto region, 35% of suspended particulate matter is emitted by diesel vehicles. It is said that said black smoke, unburned fuel and sulfur compounds will seriously damage human health. In particular, particulate matter contained in exhaust gas emitted from diesel-engined automobiles is called DEP. Particulate matter with very small particle diameters, that is to say particles with a diameter of no more than 2.5 micrometers, is called fine particulate matter (PM2.5), and they have been actively studied in Europe and the United States. For this...

AI Technical Summary

Problems solved by technology

For example, when a particle is viewed through a microscope, the image of the particle is blurred by the image of the filter in the background

Therefore, observation of particle images is difficult

[0005] Also, when the amount of particles is measured by measuring the weight of the filter before trapping the suspended particulate matter and measuring the weight of the filter after trapping the suspended particulate matter, since the filter usually absorbs moisture, so errors can occur due to the difference between the amount of moisture absorbed before and after the suspended particulate matter is trapped

[0006] In addition, it is difficult to separate the suspended particulate matter that has been collected by the filter

Therefore, it is difficult to irradiate individual particles with electromagnetic waves

Therefore, it is difficult to perform spectral analysis of suspended particulate matter

In addition, it is difficult to extract suspended particulate matter from the filter

Therefore, it is difficult to perform gas chromatography-mass spectrometry analysis of suspended particulate matter

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