Ion mobility spectrometer
A technology of ion mobility and ions, applied in mass spectrometers, dynamic spectrometers, instruments, etc., can solve problems such as ion packet overlap, restricted combination, and data interpretation confusion
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[0030] Referring to FIG. 1 , there is shown a prior art (Anal. Chem., 2008, v.80, pp.612-623, incorporated herein by reference) tandem 11 ion mobility spectrometer (IMS)— - A time-of-flight mass spectrometer (TOF MS) comprising: an ion source 12; an hourglass-shaped ion funnel 13 connected to an RF signal with overlapping axial DC gradients, included between the funnel plates; connected to a switched DC signal Three grids 14, 15 and 16 for ion gating; ion drift tube 17 filled with gas at pressures from 1 to 10 mbar; second ion funnel 18 for converging ion flow; a differentially pumped quadrupole ion guide 19 at an air pressure of 100 mTorr; and a differentially pumped time-of-flight mass spectrometer 20 with orthogonal acceleration. Pumping is shown by white arrows. Some of the RF and DC supplies are shown by boxes. An electrospray (ESI) ion source is shown through a schematic view of the ESI droplet beam, with a gas injector passing through the source - through the light co...
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