Nuclear magnetic resonance spectrometry

Details Nuclear magnetic resonance spectrometry Nuclear magnetic resonance spectrometry

1984-11-26

1987-02-03

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324307, G01R 3320

Patent

active

046410961

ABSTRACT:
A nuclear magnetic resonance spectrometry is disclosed in which a 90.degree. pulse and a 180.degree. pulse are applied to nuclei under observation at a time interval of t. Then, the resulting echo signal is observed after a period of t. Either a strong 90.degree. pulse of strong RF waves are applied to nuclei that are not observed. The strong RF waves decouple the nuclei not observed over a broad range. The application of the strong 90.degree. pulse or RF waves is initiated in synchronism with the 180.degree. pulse. The application of the RF waves are terminated before the beginning of the observation of the echo signal. The observation made in this way makes it possible to obtain spectra of quaternary carbons, the spectra including the information about long-range coupling.

REFERENCES:
patent: 4045723 (1977-08-01), Ernst
patent: 4345207 (1982-08-01), Bertrand
patent: 4443761 (1984-04-01), Levitt
patent: 4470014 (1984-09-01), Levitt
patent: 4477777 (1984-10-01), Gordon
patent: 4502008 (1985-02-01), Ohuchi
patent: 4510449 (1985-04-01), Ernst
patent: 4521732 (1985-06-01), Pegg
"Pulse Sequence for the Generation of a .sup.13 C Subspectrum of Both Aromatic and Aliphatic Quaternary Carbons" by M. Robin Bendall et al., Journal of Chemical Society, Chemical Communications, 1982, pp. 1138-1140.

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