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- Title
STUDY ON CALIBRATION TECHNOLOGY OF CONDENSATION PARTICLE COUNTER FOR PARTICLE POLLUTANT MEASUREMENT FROM VEHICLE EMISSION.
- Authors
Guo Li-Xu; Liu Jun-Jie; Liu Yue; Xiao Ji; Ren Jun; Xu Xiao
- Abstract
As the main source of PM2.5 pollutions in the ambient air, pollutant from heavy-duty and light-duty vehicle emission have gradually been concerned. The control of particulate matter emission and the accurate measurement of the particle number concentration have become one of the main measures for PM2.5 improvements. For promoting the reliability and decreasing uncertainty of traditional calibration method for condensation particle counter (CPC) which is widely used in vehicle emission measurement, a high-precision aerosol electrometer is firstly developed, which can measure aerosol samples accurately at larger than 3700 particles cm-3 with relative uncertainty better than 1.6% (k=2). Meanwhile, an accuracy calibration method for aerosol diluter based on quantitative aerosol generation (QAG) technology was developed. Therefore, on this basis, by accurately diluting the high concentration aerosol sample and comparing with the high-precision aerosol electrometer, the CPC calibration could be achieved in the range above 30 particles cm-3 with relative uncertainty better than 4.0% (k=2). By using the developed calibration method, particle counting efficiency of CPC in single particle counting mode could be evaluated, and traceability and reliability of particle number concentration measurement data for vehicle emission could be ensured.
- Subjects
AEROSOL sampling; AIR pollution; AEROSOLS; POLLUTANTS; CONDENSATION
- Publication
Environmental Engineering & Management Journal (EEMJ), 2024, Vol 23, Issue 5, p923
- ISSN
1582-9596
- Publication type
Article
- DOI
10.30638/eemj.2024.072