Method of measuring ion mobility spectra

Details Method of measuring ion mobility spectra Method of measuring ion mobility spectra

1996-04-24

1998-02-17

Berman, Jack I.

Radiant energy

Ionic separation or analysis

Methods

250287, H01J 4940

Patent

active

057193924

ABSTRACT:
A method for measuring the mobility spectra of ions with ion mobility spectrometers (IMS). The method consists of impressing upon the essentially continuous ion flow of an IMS ion source, which comprises various ion types with various mobitities, a temporal switching signature with an ion admission of approximately 50% by using a very fast ion flow switch, whereby the signatures for the various ion types are displaced toward each other in different manners during the operating time due to the different velocities. From the quasi-continuously received ion current signal at the end of the path of the ion mobility spectrometer the composition of the ion types can be recovered according to mobility and intensity by decoding the switching signature. At the same time an improvement in resolution can be achieved by deconvolution of the diffusion profile. The method has a high duty cycle for the substance admitted and for the ions of ion flow.

REFERENCES:
patent: 4633083 (1986-12-01), Knorr et al.
patent: 4707602 (1987-11-01), Knorr
patent: 5331158 (1994-07-01), Dowell
patent: 5367162 (1994-11-01), Holland et al.
patent: 5371364 (1994-12-01), Davies et al.
patent: 5396065 (1995-03-01), Myerholtz et al.
F.J. Knorr et al., Fourier Transform Ion Mobility Spectrometry, Analytical Chemistry, vol. 57, No. 2, pp.402-406, Feb. 1985.
F.J. Knorr, Fourier Transform Time-of-Flight Mass Spectrometry, Analytical Chemistry, vol. 58, No. 4, pp.690-694, Apr. 1986.
M. Misakian et al., Drift tubes for characterizing atmospheric ion mobility spectra using ac, ac-pulse, and pulse time-of-flight measurement techniques, Rev. Sci. Instrum., vol. 60, No. 4, pp. 720-729, Apr. 1989.

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