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Application of carbon nanospheres and calibration method of PM2.5 mass concentration tester

A nano-carbon ball, mass concentration technology, applied in nanotechnology, measuring devices, scientific instruments, etc., can solve the problems of poor solid state, large particle size of glass microbeads, good dispersibility, etc. Stable, good dispersion effect

Active Publication Date: 2022-07-29
JIANGSU INST OF METROLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the particle size of glass beads is too large, latex particles and polystyrene have good dispersion when stored in water, but the solid form is not good. Although silica barely meets the above requirements, it is closer to the mineral composition, and PM2.5 in reality The composition varies greatly

Method used

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  • Application of carbon nanospheres and calibration method of PM2.5 mass concentration tester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] An application of nano carbon spheres, wherein the nano carbon spheres form dust substances, the particle size of the nano carbon spheres is between 0 and 1 micron; the dust substances are used as detection standard samples of a PM2.5 mass concentration measuring instrument. The carbon nanospheres are obtained by being placed in anhydrous ethanol for ultrasonication and drying.

[0036] A method for preparing a detection standard sample of a PM2.5 mass concentration analyzer, comprising the following steps:

[0037] In step 1, 2 g of glucose was dissolved in 25 mL of deionized water, and after stirring evenly, a deionized water sugar solution was obtained.

[0038] In step 2, the deionized water sugar solution obtained in step 1 was moved to a high-pressure reaction test tube with a volume of 35 mL, and the high-pressure reaction test tube was placed in the cavity of the microwave synthesizer, and the temperature was kept at 160° C., and the reaction was heated for 4 h....

Embodiment 2

[0050] In step 3, the obtained dust material was put into anhydrous ethanol for ultrasonic treatment, repeated and rinsed 3 times, dispersed in anhydrous ethanol, and then dried at 80 °C to effectively prevent possible polymerization during storage. Phenomenon.

Embodiment 3

[0052] The difference between this example and Example 1 is that the high-pressure reaction test tube is placed in the cavity of the microwave synthesizer, the constant temperature is 140° C., and the reaction is heated for 6 hours.

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Abstract

The invention discloses application of carbon nanospheres and a calibration method of a PM2.5 mass concentration determinator. The carbon nanospheres form a dust substance, and the particle size of the carbon nanospheres is 0-1 micron; the dust substance is used as a detection standard sample of the PM2.5 mass concentration determinator, and the PM2.5 mass concentration determinator is calibrated through the detection standard sample. The method can be used for detection of the PM2.5 mass concentration tester, the detection confidence is high, and the procedure is simple.

Description

technical field [0001] The invention relates to a detection standard sample and a preparation and calibration method of a PM2.5 mass concentration measuring instrument, belonging to the technical field of measurement and detection. Background technique [0002] With the development of society, people pay more and more attention to environmental protection. As one of the important indicators reflecting the degree of air pollution, PM2.5 has always been a hot spot of social concern. The so-called PM2.5, the Chinese name is fine particulate matter, refers to the particulate matter in the ambient air with an aerodynamic equivalent diameter of less than or equal to 2.5 microns, with small particle size, large area, strong activity, and easy to carry toxic and harmful substances. Due to the characteristics of long residence time and long conveying distance, the concentration value is generally expressed in micrograms per cubic meter. [0003] To detect the concentration of PM2.5,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06B82Y35/00B82Y40/00
CPCG01N15/06B82Y35/00B82Y40/00Y02A50/20
Inventor 邢金京蔡冶强欧阳广娜王以堃付川
Owner JIANGSU INST OF METROLOGY