Particulate matter sampling device, aerosol mass spectrometer and single particle diameter measuring method

The invention belongs to an aerosol sample introduction and particle measurement method, and aims to solve the problem that fitting parameters of an existing correction method change along with conditions when a single-particle aerosol mass spectrometer is used for measuring particle diameters aiming at adverse effects of ambient pressure fluctuation and sample introduction port blockage. In order to solve the technical problems that a particle size calibration curve cannot be influenced by air pressure fluctuation or sample inlet blockage, the invention provides a particulate matter sampling device, an aerosol mass spectrometer and a single particle diameter measurement method, which can be used for continuously and controllably diluting and adjusting environmental aerosol entering a cavity of the device and is suitable for a range from negative pressure to positive pressure. Besides, if the air pressure at the inlet of the aerodynamic lens changes due to fluctuation of ambient air pressure or blockage of a