Ion mobility spectrometry drift gas filtration device and ion mobility spectrometer

Abstract

The application relates to an ion mobility spectrometry drift gas filtering device and an ion mobility spectrometer, the ion mobility spectrometry drift gas filtering device comprising a first filtering tank, a second filtering tank and an electrostatic polar filter layer connected in series; the first filtering tank is filled with molecular sieves and metal organic framework materials, the molecular sieves are used for adsorbing water molecules, and the metal organic framework materials are used for adsorbing polar organic matters; the second filtering tank is filled with silica gel and activated carbon, and the silica gel and the activated carbon are used for adsorbing non-polar organic matters and water molecules; the electrostatic polar filter layer is used for adsorbing particulate matters; drift gas passing through the electrostatic polar filter layer is used for supplying a drift tube of the ion mobility spectrometer, so that the water molecules, the polar organic matters, the non-polar organic matters and the particulate matters in the drift gas can be filtered in multiple stages, the purity of the drift gas is improved, the interference of water and impurities on the performance of the ion mobility spectrometer is reduced, and the detection precision and stability of the ion mobility spectrometer are improved.

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