Patent ID: 6972407
Filing Date: 2005-12-06
Classification: B01L,G01N,H01J

Abstract:
1. Field asymmetric ion mobility spectrometer apparatus, comprising a sample preparation and introduction section, including a head for delivery of ions from a sample, and an ion filtering section, an output part and an electronics part, said filter section comprising surfaces defining a flow path, further comprising ion filter electrodes facing each other over said flow path, said flow path for the flow of ions between said electrodes, said ions derived from said sample, said electronics part configured to apply controlling signals to said electrodes, said electronics part applying a signal across said electrodes for generating a filter field having a condition for filtering the flow of said ions in said flow path according to said conditions, and said filter field being compensated to pass desired ion species out of said filter, said passed desired species flowing along said flow path to said output part.