In order to support the implementation of relevant ecological environment quality standards and pollutant emission standards, the Ministry of Ecology and Environment recently issued four national ecological environment standards, including "Determination of Benzene Series Compounds in Fixed Pollution Source Waste Gas by Gas Bag Sampling/Direct Injection Gas Chromatography Method" (HJ 1261-2022), "Three point Comparison Stinky Bag Method for Determination of Odor in Environmental Air and Waste Gas" (HJ 1262-2022), "Determination of Total Suspended Particulate Matter in Environmental Air by Weight Method" (HJ 1263-2022), and "Technical Guidelines for Satellite Remote Sensing Fine Particulate Matter (PM2.5) Monitoring" (HJ 1264-2022).
The "Determination of Benzene Compounds in Waste Gas from Fixed Pollution Sources - Gas Chromatography with Gas Bag Sampling/Direct Injection" (HJ 1261-2022) was first released and is applicable to the determination of benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene, isopropylbenzene, and styrene in waste gas from fixed pollution sources. It supports the implementation of 13 pollutant emission standards, including the "Comprehensive Emission Standards for Air Pollutants" (GB 16297-1996). The method of direct injection measurement is adopted without pre-treatment, and the instruments and equipment used are widely used. The method is easy to master and has good universality and operability.
The "Three point Comparative Odor Bag Method for the Determination of Odor in Environmental Air and Waste Gas" (HJ 1262-2022) is applicable to the determination of odor in environmental air, unorganized emission monitoring point air, and fixed pollution source waste gas, supporting the implementation of eight pollutant emission standards such as the "Odor Pollutant Emission Standard" (GB 14554-1993). Compared with the "Three point Comparative Stinky Bag Method for Determination of Odor in Air Quality" (GB/T 14675-1993), adding requirements for materials and equipment, experimental personnel, solution preparation, quality assurance, and quality control, improving sample classification, analysis steps, and result calculation, can effectively improve the accuracy, consistency, and comparability of the method, and has the characteristics of simple equipment and easy promotion.
The "Determination of Total Suspended Particles in Environmental Air by Weight Method" (HJ 1263-2022) is applicable for manual determination of total suspended particles in environmental air and unorganized emission monitoring points, supporting the implementation of the "Environmental Air Quality Standards" (GB 3095-2012). Compared with the "Determination of Total Suspended Particulate Matter in Environmental Air by Weight Method" (GB/T 15432-1995), there are additional requirements for normative references, terminology and definitions, sample preservation, quality assurance and control, and precautions. The content of samples, analysis steps, results, and calculations is refined, and the accuracy requirements of the balance are tightened to further improve the accuracy of monitoring data for total suspended particulate matter in environmental air, providing necessary basis for particle source analysis and air quality forecasting.
The "Technical Guidelines for Satellite Remote Sensing Fine Particulate Matter (PM2.5) Monitoring" (HJ 1264-2022) was first released and is applicable to satellite remote sensing fine particulate matter monitoring in terrestrial areas. As a supplement to ground monitoring methods, it is used to grasp the spatial distribution patterns and trends of fine particulate matter on a large scale, providing strong technical support for air pollution prevention and control work.
The release and implementation of the above four standards are of great significance for further improving the ecological environment monitoring standard system, regulating ecological environment monitoring behavior, improving the quality of ecological environment monitoring data, serving ecological environment supervision and law enforcement, promoting ecological environment protection, and safeguarding human health.
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