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Rapid analysis method of polonium-210 in aerosol

A rapid analysis and aerosol technology, applied in the field of radiochemical analysis, can solve the problems of time-consuming, inability to achieve rapid measurement, lengthy measurement technical steps, etc., to achieve the effect of improving the measurement rate

Pending Publication Date: 2020-04-10
CHINA INST FOR RADIATION PROTECTION
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Problems solved by technology

[0004] The air pollution in cities in northern China is dominated by industrial pollution. Coal combustion is the main cause of these industrial air pollution. The radionuclides (polonium-210, Pb-210) released by coal combustion can be applied to trace the source of soot-type air pollution. The key core technology of this concept is the rapid and accurate measurement method of polonium-210 in aerosol. The existing polonium-210 measurement technology steps are lengthy and time-consuming, and the sample processing process generally exceeds 30 hours, which cannot achieve the purpose of rapid measurement.

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with specific embodiments.

[0027] A single pollution source with no other interference around 1Km downwind was selected as the sampling point, and a period of 60 weather sol samples were collected. Samples were collected once every 4 days. The sampling time of each sample was planned to be 24h. The sampling was performed using a large-flow TSP sampler. Use polypropylene filter membrane to collect. In addition, record the temperature, humidity, wind speed, wind direction, visibility and other meteorological parameters at the sampling time. Before sampling, the filter membrane should be heated to a constant weight at 80°C, weighed to record the initial mass, and weighed after collection. Finally, put the sample in a polyethylene ziplock bag and store in a dry and cool place.

[0028] Cut 0.2g aerosol film sample into small pieces into a 100mL beaker, add 30mBq Po-209 standard source, immerse it ...

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Abstract

The invention discloses a rapid analysis method of polonium-210 in aerosol. The method comprises the steps of aerosol sample treatment, polonium-210 chemical analysis, polonium-210 activity concentration calculation in an aerosol sample and the like. According to the method disclosed by the invention, the sample treatment process only needs 4 hours, so that the measurement rate of polonium-210 inaerosol is greatly improved.

Description

Technical field [0001] The invention relates to the technical field of radiochemical analysis, in particular to a rapid analysis method of polonium-210 in aerosol. Background technique [0002] Atmospheric particulate matter (aerosol) is divided into total suspended particulates and fly dust from the particle diameter. Particles with an aerodynamic diameter of less than 100μm are called total suspended particulates and are denoted as TSP. Atmospheric particulates will not only reduce atmospheric visibility, but also The characteristics of long residence time and long conveying distance in the medium have an important impact on air quality. In addition, because these atmospheric particles are easy to absorb harmful heavy metals and organics, bacteria and viruses, they enter the blood through the nasal cilia or deposit in the lungs along with the breath, which seriously endangers human health. Therefore, identifying the pollution source of atmospheric particulate matter is conduci...

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Application Information

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IPC IPC(8): G01T1/167
CPCG01T1/167
Inventor 马莉娜宋丽娟戴雄新
Owner CHINA INST FOR RADIATION PROTECTION
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