Fourier transform time of flight mass spectrometer

Details Fourier transform time of flight mass spectrometer Fourier transform time of flight mass spectrometer

1985-11-25

1987-11-17

Anderson, Bruce C.

Radiant energy

Ionic separation or analysis

Methods

250281, 250287, 364498, B01D 5944

Patent

active

047076020

ABSTRACT:
A time of flight mass spectrometer includes means for gating the flow of ions from the source to the detector with a modulation function, the frequency of which is swept. The detected ion current is obtained as a function of the ion current modulation frequency to derive an ion mass interferogram output in the frequency domain. The interferogram output is Fourier transformed from the frequency domain to the time domain to obtain a time of flight mass spectrum output in the time domain. The Fourier transform time of flight mass spectrometer provides increased duty cycle and signal-to-noise ratio for a given scan time.

REFERENCES:
patent: 3553452 (1971-01-01), Tierman
patent: 3629574 (1971-12-01), Carroll et al.
patent: 3920978 (1974-02-01), Schmitt
patent: 3989938 (1976-11-01), Auth
patent: 4390784 (1983-06-01), Browning
patent: 4514822 (1985-04-01), Schneider
patent: 4590574 (1986-05-01), Edmonds et al.
"Fourier Transform Ion Mobility Spectrometry", Knorr et al., Anal. Chem., vol. 57, No. 2, 2-85, pp. 402-406.

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