Patent ID: 8664593
Filing Date: 2014-03-04
Classification: G01N,H01J

Abstract:
1. A High Field Asymmetric Waveform Ion Mobility Spectrometry (FAIMS) apparatus comprising: (a) an ion source; (b) a first and a second gas inlet; (c) an expansion chamber receiving first and second gas flows from the first and second gas inlets, respectively; (d) an outer electrode having a generally concave inner surface and comprising: (e) an inner electrode having a generally convex outer surface that is disposed in a spaced-apart and facing arrangement relative to the inner surface of the outer electrode for defining an ion separation region therebetween, wherein the combined gas flow and a portion of the ions are received into the ion separation region from the ion inlet and travel through the ion separation region from the ion inlet to the ion outlet.