In order to investigate the distribution characteristics of particulate mercury, 12 degrees Nano-moudi (6.2-9.9 μm, 3.1-6.2 μm, 1.8-3.1 μm, 1.0-1.8 μm, 0.56-1.0 μm, 0.32-0.56 μm, 0.18- 0.32 μm, 0.10-0.18 μm, 0.056-0.10 μm, 0.032-0.056 μm, 0.018-0.032 μm, 0.010-0.018 μm) impactor was used to measure the size distributions of atmospheric particulate mercury on both haze and non-haze days in Shanghai. 
Nano-moudi