Swiss Vantone Marga escorts the G20's white clouds and blue sky
In order to ensure the successful completion of the G20 summit, Zhejiang Hangzhou is carefully prepared and the entire Yangtze River Delta region is actively taking action. The Metrohm Online Aerosol and Atmospheric Ion Concentration Monitor Marga, known as the Air Quality Warning Guardian, is located in the surrounding areas of Hangzhou, such as Ningbo, Qiandao Lake, Shanghai Qingpu, Chongming, Suzhou Industrial Park, Shanghai Pudong, etc. It monitors the small changes in ambient air quality around the entire G20 summit. Successfully escorted the G20 summit
In order to ensure the automatic monitoring of the air quality of the Marga equipment, the Vantone operation and maintenance personnel are on standby, automatically monitor the air quality monitoring data in real time for 24 hours without gaps, capture any small changes in air quality, and provide reliable and scientific data for the G20 main committee. .
A year ago, Marga of Metrohm in Switzerland played a key role in the air quality assurance of the Nanjing Youth Olympic Games, and was highly praised by the environmental protection department of Jiangsu Province. All the technicians of Metrohm are confident and capable, and Marga still plays an irreplaceable role during this G20 summit.
Charm Hangzhou is not only beautiful, but also blue sky and clear air. Metrohm is wishing the G20 summit to be held successfully!
What is MARGA?
Marga is an instrument that monitors the concentration of relevant inorganic substances in aerosols and gases in the ambient atmosphere. The vacuum pump pumps air into the sampling box at a rate of 1 m3/h. A cyclone (PM 10 or PM 2.5 μm) placed in the inlet was used to screen the size of the particulate matter (PM). In the sampling tank, the soluble gas is quantitatively absorbed by a rotary liquid cavier (WRD). Due to the different diffusion rates of the aerosol and gas, the aerosol is captured by the WRD and by a steam jet aerosol collector (SJAC) connected to the WRD. Steam injection produces a supersaturated state that causes the water vapor condensation process to occur.
The condensed aerosol is separated from the gas stream in a cyclone. The flow from the WRD and SJAC was collected by a 25 ml burette in the analysis chamber, degassed and mixed with the internal standard, and quantitatively injected into the cation chromatography and anion chromatography. Use a concentrating column for a lower detection limit. The system is calibrated with an internal standard, and the internal standard is usually composed of a standard solution of yin and yang that is not contained in the ambient air.
Main functions and features
Air pollutants can be classified into pollutant gases and particulate pollutants (Particulate Matter, PM). Fine particulate contaminants can penetrate into the lungs of the human body and cause serious damage to human health. At present, the threat of PM to human health is a hot spot of global concern, but it is unclear which components will cause damage to human health. To figure this out, you need a lot of special, long-term monitoring data.
MARGA provides a new, online measure of atmospheric pollution monitoring and research for atmospheric research. It uses a unique sampling device to directly absorb particulate pollutants and acid gases into the water phase, and then uses ion chromatography to monitor its composition. The whole process is fully automated. The liquefied samples collected by Marga MARGA can be used directly with other analytical instruments to analyze heavy metals or other organic contaminants.
MARGA can simultaneously collect and measure air samples of PM10 and PM2.5. The process is completely automatic and can be used for remote data monitoring and acquisition.
Developed by the Energy Research Centre of the Netherlands (ECN) and Metrohm and Applikon, MARGA is the world's only online gas component and aerosol ion monitoring system certified by the US Environmental Protection Agency (EPA). At present, Marga MARGA has been installed in the United States, Europe, Asia, China, South Korea and other countries to invest in the field of atmospheric testing, and has been unanimously recognized by atmospheric environmental experts.
MARGA Online Gas Components and Aerosol Monitoring System
? Reliable sampling and metering device with a recovery rate of 99.7%
High measurement accuracy and short analysis period (one hour)
? Up to one week of independent operation, no operator is required
Professional operating software with different security levels
? Remote data transmission and diagnosis, control
To date, several sets of Marga MARGA have been installed in various locations in China and have entered the field air monitoring:
• Installation of multiple systems at the Shanghai Environmental Protection Research Institute and Shanghai Fudan University, providing important parameters for the monitoring of sea air pollution at the Shanghai World Expo 2010, and continuing to play an important role in monitoring Shanghai's air pollution projects, especially for the haze weather in Shanghai. Research provides important and reliable data.
• Several sets of Marga MARGA installed in Guangzhou and Shenzhen, the user continuously monitors the air quality of Guangzhou and Shenzhen, including Daya Bay, for the 24-hour continuous monitoring of the Guangzhou Institute of Tropical Oceans and the Shenzhen Meteorological Bureau of the China Meteorological Administration.
? The Marga MARGA installed in Hong Kong is the Hong Kong Government Environmental Protection Agency. It has conducted joint air monitoring at the Hong Kong Polytechnic University and the Hong Kong University of Science and Technology. The experiment proves that the instrument performance is stable, the data is reliable, and the effective data exceeds the user's requirements. It provides a large and powerful scientific basis for air pollution research and monitoring in Hong Kong and the Pearl River Delta, and has been unanimously affirmed by relevant government experts and environmental scholars.
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