Zhejiang Metrology Institute's achievements in the field of environmental monitoring have been authorized by the national invention patent

[ China Instrument Network Instrument Development ] Recently, a "single-dispersion aerosol particle size and concentration measuring device based on light scattering" developed by Zhejiang Institute of Metrology has been authorized by the national invention patent.

The patent proposes a measurement method combining photometric method and particle counting method based on the principle of light scattering, realizing rapid and accurate measurement of large-scale particle size and large-scale concentration of monodisperse aerosol in the same device, and solving aerosol particle size and concentration detection. The instrument value traceability problem. It can be applied to the calibration and calibration of PM2.5 monitoring instruments and aerosol monitoring in environmental protection and meteorology.

In order to establish an effective measurement standard for PM2.5 respirable particulate matter, the Zhejiang Metrology Institute created a project team to carry out related research. The research team carried out related metrological verification and calibration research on atmospheric particulate matter, trace gas atmospheric sampler, visibility meter, etc., and took the lead in conducting research and method of PM2.5 particulate matter measurement traceability by undertaking major science and technology special project and condition construction project of Zhejiang Science and Technology Department. Establish, make the monitoring data of PM2.5 traceable, establish the reference method of PM2.5 measurement, carry out the traceability study of PM2.5 mass concentration, realize the accurate traceability of PM2.5 measurement results, and carry out PM2.5 The establishment of the metering standard device for inhalation particulate matter measuring instrument meets the requirements of production units, users and measuring units in the PM2.5 measurement process, and ensures the accuracy and reliability of the province's environmental monitoring data.

PM2.5 mass concentration verification device can be used for calibration and calibration service of PM2.5 automatic monitor, and provide reference for accurate monitoring data. At the same time, Zhejiang Metrology Institute has undertaken the PM2.5 automatic monitor of Zhejiang Quality Supervision Bureau. The verification procedure "the development of local measurement technical specifications.

Through the stability and repeatability test of PM2.5 mass concentration verification device, the standard device passed the expert on-site assessment in November 2017, and took the lead in establishing social public measurement standards, which filled the blank of the particle detection capability of Zhejiang Metrology Institute. .

(Original title: The results of an environmental monitoring field of the Provincial Metrology Institute were authorized by the national invention patent)