Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1996-06-21
1998-11-17
O'Shea, Sandra L.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
G01R 3346
Patent
active
058381562
ABSTRACT:
An apparatus for automatically correcting phase shifts in a nuclear magnetic resonance (NMR) spectrum. The apparatus comprises first and second phase correction means. The first phase correction means corrects phase shifts due to measurement delay, phase shifts due to a frequency filter, and phase shifts due to off-resonance effects. The second phase correction means corrects constant terms of the phase shifts. Where the spectrum is a multi-dimensional NMR spectrum, the first phase correction means corrects the phase shifts on the directly observed axis. The first phase correction means corrects the phase shifts due to the measurement delay and the phase shifts due to the off-resonance effects on the indirectly observed axis. The second phase correction means corrects the phase shifts only on the directly observed axis. This construction permits automatic corrections of the phase shifts without relying on spectroscopist's eye, individual intuition or experience.
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"Automated Phase Correction of FT NMR Spectra by Means of Phase Measurement Based on Dispersion versus Absorption Relation (DISPA)", Edward C. Craig et al., Journal of Magnetic Resonance, 76, pp. 458-475 (1988).
Jeol Ltd.
O'Shea Sandra L.
Phillips Roger C.
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