PM2.5 detection traceability key technology passed expert appraisal

[China Instrument Network Instrument R&D] “Study on Key Technology for Traceability of PM2.5 Detection Values” The scientific and technological achievements passed the expert appraisal a few days ago. The project studied the establishment of a dust concentration calibration device, PM2.5 cutting efficiency calibration device.

On June 30, 2016, commissioned by the China Instrument and Metering Society, the Guangzhou Instrument and Metering Society organized and presided over the completion of the “Guangdong Provincial Institute of Metrology Research (Guangdong Province Key Laboratory of Modern Geometry and Mechanics Measurement Technology)” in Guangzhou. PM2.5 detection traceability key technology research "scientific and technological achievements appraisal meeting.

The appraisal meeting was presided over by Zhang Jianmin Senior Engineer, Deputy Director of the Committee of Experts of the Instrument Society of Guangzhou City. The letter of invitation from the China Instrument and Control Institute was read out first. Professor Liu Guixiong from the South China University of Technology, Professor Wang Xiaohui from the Guangdong Institute of Optics, Professor Chen Liuping from the Sun Yat-sen University, and the Ministry of Environmental Protection were selected. Professor Ren Mingzhong from South China Institute of Environmental Science, Prof. Chen Changfu from Jinan University, Professor Zheng Yongwu from the Guangzhou Institute of Electronic Technology of the Chinese Academy of Sciences, and Professor Peng Rongfei from the Guangzhou Center for Disease Control and Prevention jointly formed an evaluation committee.

The appraisal committee believes that the project has established a dust concentration calibration device and a PM2.5 cutting efficiency calibration device. By studying the homogeneity and stability of the device, a stable particle system was obtained, which can effectively simulate the PM2.5 distribution in the air. In the cutting efficiency calibration device, an on-line diversion measurement model based on real-time measurement of aerosol concentration and particle size was developed. Simultaneous measurement of the aerosol concentration at the upstream and downstream of the cutter was realized, and the difficulty in measuring the particle concentration before and after the cutter was solved. problem. Based on this, a calibration study of PM2.5 detector indication and cutting efficiency was conducted. A calibration method for PM2.5 detector was established to provide a technical basis for the establishment of PM2.5 detector traceability system. The established PM2.5 detector calibration method is accurate and reliable, and has operability. The “Regulation for Local PM Testing of Portable PM2.5 Detectors in Guangdong Province” has been approved and participated in the national measurement of PM2.5 monitors. The drafting of the "Calibration Criteria" (completed the draft for consultation); the results have been applied in southern China and have achieved good social and economic benefits. It is recommended to strengthen the protection of intellectual property and increase the effectiveness of the promotion and application of results. The project achievements are at the leading domestic level in the traceability technology and equipment of PM2.5 detection value, and they agree to pass the identification of scientific and technological achievements.

(Original Title: An Achievement of the Metrology Institute of Guangdong Province Approved by the Scientific and Technological Achievements of the China Instrument and Control Society)