AEROSOL MASS SPECTROMETRY SAMPLING DEVICE HAVING WIDE PARTICLE SIZE RANGE, AND AEROSOL MASS SPECTROMETER

摘要

An aerosol mass spectrometry sampling device having a wide particle size range, and an aerosol mass spectrometer. The aerosol mass spectrometry sampling device comprises: an aerosol delivery tube (10), a first aerosol focusing member (21), a first buffer tube (22), a critical orifice plate (30), a buffer cavity (40), a second buffer tube (51), a second aerosol focusing member (52), a third buffer tube (61), and a third aerosol focusing member (62). The first aerosol focusing member (21) and the first buffer tube (22) are disposed in front of the critical orifice plate (30). The first aerosol focusing member (21) pre-focuses sample aerosol before the sample aerosol enters the critical orifice plate (30), so that the loss caused by relatively large particles in the sample aerosol colliding with the critical orifice plate (30) when passing through a center hole of the critical orifice plate (30) can be avoided, and the transmission performance of particles having a particle size of 1 μm or more can be greatly improved, thus the particle size range of the particles passing through the center hole of the critical orifice plate (30) is increased. In this way, the detection of aerosol particles having a wide particle size range can be achieved. Furthermore, the deposition and adhesion effects of large particles on the critical orifice plate (30) are also greatly reduced, and the frequency of instrument maintenance and cleaning is reduced.