https://www.selleckchem.com/pr....oducts/Tanshinone-I.
Zhengzhou is one of the most heavily polluted cities in China. This study collected samples of PM2.5 (atmospheric fine particulate matter with aerodynamic diameter ≤ 2.5 μm) at five sites in different functional areas of Zhengzhou in 2016 to investigate the chemical properties and sources of PM2.5 at three pollution levels, i.e., PM2.5 ≤ 75 μg/m3 (non-pollution, NP), 75 μg/m3 150 μg/m3 (heavy pollution, HP). Chemical analysis was conducted, and source categories and potential source region were identified for PM2.5 at different pol
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