Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1982-11-01
1985-04-09
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324311, G01R 3308
Patent
active
045104492
ABSTRACT:
In recording two-dimensional nuclear magnetic resonance spectra, J cross peaks which hinder the interpretation of the spectragram and mask cross peaks of incoherent exchange processes or transfers are eliminated by one of two methods. In the first method, for each repetition of a measurement with an evolution period t.sub.1 between the first and second of two successive 90 degree pulses, the interval between the second and third 90 degree pulse (mixing time t.sub.m) is varied systematically in proportion to the evolution period. The two-dimensional spectra obtained is subjected to triangular multiplication or symmetrization so that all peaks which do not possess counterparts at the mirror symmetry positions of the main diagonal are eliminated. In the second method, the mixing time is kept constant and a 180 degree pulse is inserted between the second and third 90 degree pulse with a varying interval t.sub.p between the 180 degree pulse and the second 90 degree pulse for each repetition of a measurement. A spectrometer for carrying out this method permits critical parameters to be adjusted.
REFERENCES:
patent: 4318043 (1982-03-01), Crooks
S. Macura et al., Two-Dimensional Chemical Exchange and Cross-Relaxation Spectroscopy of Coupled Nuclear Spins, Journal of Magnetic Resonance, vol. 43, 1981, No. 2, pp. 259-281.
K. Nagayma, Spin Decoupling in Two-Dimensional J-Resolved NMR, J. Chem. Phys., vol. 71, 1979, No. 11, pp. 4404-4415.
R. Baumann, Improvement of 2D NOE and 2D Correlated Spectra by Triangular Multiplication, J. of Mag. Res., vol. 44, 1981, pp. 76-83, 402-406.
W. E. Hull, The New Aspect 2000 High-Speed Pulse-Programmer, Bruker-Report, 1980, No. 2, pp. 10-13.
Ernst Richard R.
Macura Slobodan
Wuthrich Kurt
Spectrospin AG
Tokar Michael J.
LandOfFree
Method for recording two-dimensional nuclear magnetic resonance does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for recording two-dimensional nuclear magnetic resonance , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for recording two-dimensional nuclear magnetic resonance will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1172090