Binding of the ion focusing and ion mobility-based differential ambient pressure ion pre-filtering at low flow rate for a portable mass spectrometer

摘要

Ion focusing assembly for orienting into the ion detector and prefilter, an ion current before operating at atmospheric pressure, based on the mobility of ions, for example, to a mass spectrometer and (MS), to analyze the ions The method and apparatus of the. The filter based on the mobility, may be a (IMS) ion mobility spectrometer cylindrical electric field asymmetric waveform ion mobility spectrometer (FAIMS), suction differential mobility spectrometer or plane or (DMS),. The two grids having an opening through which ions flow through a DC power supply 2, the ion focusing assembly, and a variable power time for generating an electric field between the grids.