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Study, Location, Period, and Measurements
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Source Apportionment Method
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Findings
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Reference: Beijing PM2.5 study (Zhang Y.H. et al., 2004)
When: 24-h samples were acquired during April 25-30, 2000, August 18-25, 2000, October 30-November 4 and January 9-14, 2001.
Where: Three sites include Beijing Union University (BUU), Chinese Academy of Preventive Medicine (CAPM), and Chinese Research Academy of Environmental Sciences (CRAES).
Ambient: Samples were acquired with a MOUDI-100 impactor, A-245 dichotomous sampler and a PM2.5 sampler and a self-developed sampler. The samples were analyzed for mass, 19 elements (by ICP-AES), ions (NO3−, SO42−, and NH4+ by IC), carbon (OC and EC by NIOSH), and organic compounds (including PAHs by Gas Chromatography/Mass Spectrometry).
Source: No area-specific source profile measurements were taken.
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Solution: CMB
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Average CMB-calculated source contribution to PM2.5 (in % mass):
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