IMS instrumentation is comprised of four major sub-components: an ion source, an ion gate, a drift region and a detector. Samples in solid, liquid or gaseous phase can be evaporated using an injection port and transferred into the reaction region of the IMS cell by carrier gas. Using the ion source, reactant ions are produced in atmospheric pressure and the product ions of sample might be produced from proton transfer reactions between analyte molecules and reactant ions. These ions move toward the detector, characterized by their gas phase mobilities in a weak electric field.
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