Radiant energy – Ionic separation or analysis – Methods
Patent
1985-04-18
1986-12-30
Anderson, Bruce C.
Radiant energy
Ionic separation or analysis
Methods
250287, B01D 5944
Patent
active
046330836
ABSTRACT:
Methods and apparatus for time dispersive ion spectroscopy such as ion mobility spectroscopy. The methods include ionizing molecules of a sample and controllably admitting pulses of the resulting ions into a drift region. The drift region has an electric field therein which forces the admitted ions through the drift region. Ions emitted from the drift region during a gate open period simultaneous with the ion admission period are exclusively detected resulting in an ion detection signal. Data is recorded for the frequency rate at which the ion pulses are admitted to the drift region and the associated ion detector signal. The frequency of admitted ion pulses is scanned over a relevant range during which the ion admission period also varies. Data recorded for frequency and ion detection can be recorded and/or transformed such as by a Fourier transform to produce time dispersive spectra in the form of ion intensity or quantity as a function of the time period necessary for the ions to transit the drift region. Such spectra are useful in identifying constituents such as organic compounds contained in the sample. The methods and apparatus allow rapid analysis of samples and can be used to simultaneously analyze discharges from sample separation apparatus such as a capillary gas chromatograph.
REFERENCES:
patent: 3553452 (1971-01-01), Tierman et al.
patent: 3626180 (1971-12-01), Carroll
patent: 3629574 (1971-12-01), Carroll
patent: 3668383 (1972-06-01), Carroll
patent: 3668384 (1972-06-01), Moorman et al.
patent: 3920978 (1975-11-01), Schmitt et al.
patent: 3989938 (1976-11-01), Auth
patent: 4390784 (1983-06-01), Browning et al.
Articles: By M. A. Baim and H. H. Hill, Jr., Analytical Chemistry, 1982, vol. 54, p. 33.
Brochures: PCP, Inc. entitled "Ion Molecule Reactor Ion Mobility Spectrometer-Quadrupole Mass Spectrometer".
PCP, Inc. entitled "Phemto-Chem Atmosphere Ion Mobility Spectrometer".
PCP, Inc. "Bibliography of Plasma Chromatography Literature".
PCP, Inc.--"Bibliography Additions Since May, 1979".
Eatherton Randy L.
Hill, Jr. Herbert H.
Knorr Fritz J.
Siems William F.
Anderson Bruce C.
Washington State University Research Foundation, Inc.
LandOfFree
Chemical analysis by time dispersive ion spectrometry does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Chemical analysis by time dispersive ion spectrometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chemical analysis by time dispersive ion spectrometry will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1548709