Investigating a sample using NMR
US5101158A · kind A · utility
Inventors
Key dates
| Filing date | Dec 3, 1990 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | Dec 3, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/4608
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of investigating a sample using nuclear magnetic resonance comprises: I) applying a magnetic field across the sample, II) applying an RF pulse to create single quantum coherences within the sample, III) applying a coherence transfer pulse after one of a first and second type of period, IV) sensing the free induction decay (FID) signa generated by the sample after the other of the first and second types of period and repeating steps II-IV with different durations (D.sub.1) of the first type of period, the duration (D.sub.2) of the second type of period being constant wherein during the first type of period nuclear spins of the single quantum coherence are allowed to evolve under the influence of the surrounding sample and magnetic field for the duration D.sub.2 of the first period type, and wherein at the end of one portion of duration D.sub.21 where D.sub.21 =D.sub.2 -D.sub.1, of the second type of period nuclear spins of the single quantum coherences have evolved only under the influence of scaler coupling with other spins while for the remainder of the second type of period nuclear spins of the single quantum coherences are allowed to evolve under the influences of the s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.