Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1985-11-18
1987-12-22
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324309, 324312, G01R 3320
Patent
active
047148829
ABSTRACT:
In accordance with the invention, two detection periods t.sub.2 and t.sub.2 ' are set by the use of a pulse train essentially consisting of three pulses. Free induction decay signals FIDa and FIDb obtained during the two periods, respectively, are stored in respective data files. The measurement is repeated a plurality of times while putting at least one of the three pulses of the pulse train out of phase with the others. The free induction decay signals FIDa and FIDb derived by each measurement are stored in their respective data files. After the measurements, a linear combination of the data items which are stored in the data files assigned either to the signals FIDa or to FIDb is formed. The resultant data is subjected to double Fourier transformation to obtain a two-dimensional NMR spectrum. The manner in which the data items are linearly combined is appropriately selected to obtain a desired kind of two-dimensional NMR spectrum.
REFERENCES:
patent: 4134058 (1979-01-01), Ernst
patent: 4510449 (1985-04-01), Ernst et al.
patent: 4513247 (1985-04-01), Ernst
patent: 4626783 (1986-12-01), Ohuchi
"COCONOSY. Combination of 2D Correlated and 2D Nuclear Overhauser Enhancement Spectroscopy in a Single Experiment", Haasnoot et al., pp. 343-349, Journal of Magnetic Resonance, 56 (1984).
"Combined COSY-NOESY Experiment" by Gurevich et al., pp. 471-478, Journal of Magnetic Resonance, 56 (1984).
Jeol Ltd.
Oldham Scott M.
Tokar Michael J.
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