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Laboratory detection and analysis system for black carbon particles

The black carbon particle laboratory detection and analysis system is mainly composed of a black carbon particle operational monitoring system and a laboratory single particle black carbon analysis system. Through the operational detection of black carbon particles, the temporal and spatial distribution of black carbon and visibility monitoring can be obtained to meet the needs of users for high-resolution forecasting and monitoring; through the laboratory single-particle black carbon analysis system, black carbon particles can be finely and quantitatively analyzed. , users can obtain comprehensive data such as particle size, mass, composition, optical properties and mixed state of a single black carbon particle, providing key data for the traceability, evolution and environmental effects of black carbon.

Program Elements

The black carbon particulate matter operational monitoring system consists of a multi-band photoacoustic extinction instrument (PAX), including three models: PAX-870, PAX-532, and PAX-405/375. PAX is a business monitoring instrument that uses photoacoustic method for high time resolution in-situ measurement. The photoacoustic method simultaneously obtains the light scattering and light absorption signals of particulate matter. The light absorption signal corresponds to the mass concentration of black carbon, and 1s resolution can be obtained. rate data. The photoacoustic method does not require the use of a filter membrane, thus ensuring the reliability and accuracy of the data.

The laboratory single particle black carbon analysis system includes single particle black carbon spectrometer (SP2), including SP2-D and SP2-XR models. SP2 measures particle size by single-particle laser scattering technology, and obtains the composition, mixing state and mass of black carbon particles by laser-induced incandescent technology (LII), and black carbon concentrations as low as 10 ng/m3 can be obtained.

Program Features

High stability and reliability

Adopt mature technology, select products with reliable and stable performance, fully consider the environment of system construction and operation, and ensure the stable and reliable operation of various equipment and software
Detection range

The detection range of PAX scattering coefficient and absorption coefficient is 1Mm-1-10,000Mm-1 (870nm, 60 sec average), and black carbon mass, extinction coefficient, SSA and dew point can be obtained at the same time; SP2 scattering signal measured particle size range of 200- 430 nm, incandescent signal mass-equivalent particle size measurement range is 70-500 nm when assuming a black carbon density of 1.8 g/cm^3, and the lowest detectable black carbon concentration is 10 ng/m3
Economical

The design and implementation of the system saves project investment as much as possible. The system design has excellent performance and high cost performance. The design focuses on reality and practical results, adheres to the principles of practicality and economy, and makes full and rational use of domestic equipment resources to help users save project investment.
Strong scalability

Design and implement the project according to the requirements of standardization and standardization. The hardware configuration and software adopt internationally standardized technology to avoid the obstacles of system interconnection; fully consider the compatibility of the system, and each sub-system can support subsequent upgrades, expansion and development.

Application Area

The laboratory detection and analysis system of black carbon particles can be applied to air quality monitoring, visibility monitoring, atmospheric and climate change, combustion emissions, biomass combustion, traceability of pollutants, research on the evolution law of black carbon particles and health effects.

Classic Cases

The Shenzhen Development and Reform Commission has implemented the project of building an integrated air-space-earth atmospheric observation network. The particle black carbon analysis system conducts online monitoring of the meteorological environment to comprehensively improve the integrated atmospheric monitoring capabilities of Shenzhen's air, space and ground, and provide support for the realization of the goal of building the atmospheric environment in the pilot demonstration zone.