Patent ID: 6495823
Filing Date: 2002-12-17
Classification: G01N,H01J

Abstract:
A field asymmetric ion mobility system comprising:a housing having planar surfaces and defining a flow path between a sample input part and an output part; the housing formed with at least a pair of substrates that extend along the flow path; ions flowing from the vicinity of the input part toward the output part along the flow path; an ion filter disposed in the flow path for filtering of said ions, the filter including at least one pair of filter electrodes, at least one electrode on each substrate across from each other in the flow path; siad electrodes being insulated from each other via said substrates; and a control part configured for application of an asymmetric periodic voltage having alternating high and low field conditions to the ion filter electrodes for generating a filter field, said filter field for controlling the travel of said ions in said filter, said filter field being compensated to pass a species of said ions through said filter for detection.