China's first PM2.5 concentration real-time monitoring instrument was successfully developed

3 seconds will be able to collect PM2.5 data "particle size × ×, particle number × ×, particle Pu × ×, PM2.5 concentration × ×", through the electronic touch screen, the staff can collect once every 3 seconds in the air Respirable particulate matter (PM2.5 and PM10) concentration and particle size distribution. On March 29th, China's first instrument (LD310 and LD320) that can detect the concentration and size distribution of respirable particles in real time passed expert appraisal in Beijing.

According to reports, PM2.5 particles in the atmosphere as less than or equal to 2.5 microns in diameter, its diameter is less than 1/20 of the size of human hair, can be directly into the lungs, has an important impact on human health and air quality. As China has always lacked the core technology of PM2.5 monitoring, foreign equipment manufacturers have seized the domestic market one after another. Under the support of the national “Eleventh Five-Year Plan” technology support plan and Beijing-related science and technology plans, Beijing Huifeng Long Biological Technology Development Co., Ltd. and The Chinese Academy of Environmental Sciences and other institutes conducted a joint research project. The LD310 aerodynamic particle size spectrometer developed has captured the core technology of aerodynamic time-of-flight light scattering particle measurement, and adopted jet acceleration technology to not only detect the concentration of PM2.5. At the same time, it can truly reflect the deposition site of atmospheric aerosol particles in the respiratory tract, and is more suitable for studying the harm of aerosol particles on human health; LD320 particle scattering spectrometry of airborne particles captures particle acceleration, light scattering particle measurement, etc. The core technology can meet the major needs of China's current PM2.5 monitoring system and the prevention and control of atmospheric pollution.

At present, LD310 and LD320 have passed technical tests and environmental adaptability tests and applied tests, and have completed prototype comparison tests with foreign beta-ray equipment. The performance indicators have reached or approached the international advanced level, filling the domestic gap.

The expert group believes that both of these instruments have independent intellectual property rights. It is of strategic significance to breakthrough the international import of technology and product dependence, to solve the current construction of China's PM2.5 monitoring system, and to prevent and control atmospheric pollution.