Ion mobility spectrometer and method of using the same

摘要

A method of detecting constituents in a sample includes generating a plurality of ions in an ionization region. The method also includes preventing the plurality of ions in the ionization region from flowing into a drift region through inducing a first voltage in a device positioned between the two regions. The method further includes injecting at least a portion of the ions from the ionization region into the drift region. The method also includes regulating the voltage in the device to a second voltage for a first predetermined temporal period, the second voltage less than the first voltage. The method further includes regulating the voltage in the device to the first voltage. The method also includes regulating the voltage in the device to the second voltage for a second predetermined temporal period, the second predetermined temporal period different from the first predetermined temporal period.

主权项

1. A method of detecting constituents in a sample, said method comprising:
channeling a sample gas stream to be tested for constituents into an ionization region; generating a plurality of ions in the ionization region; substantially preventing the plurality of ions in the ionization region from flowing into a drift region coupled to the ionization region through inducing a first voltage in a device positioned between the ionization region and the drift region; and injecting at least a portion of the ions from the ionization region into the drift region comprising:
regulating the voltage in the device to a second voltage for a first predetermined temporal period, the second voltage less than the first voltage;regulating the voltage in the device to the first voltage; andregulating the voltage in the device to the second voltage for a second predetermined temporal period, the second predetermined temporal period different from the first predetermined temporal period.