(a) Schematics of EFNMR, (b) sequences used in a study of NMR signals of organic molecules, and (c) the configuration of the EFNMR system.
Evolution of magnetization M after the NMR sequences. (a) The direction of M, , and along the z-direction; (b) M is aligned along the z-direction; (c) by applying a 90° pulse, the torque rotates the M to the x-direction; and (d) the precession of M around the after the 90° pulse is turned off.
(a) Time domain spectrum and (b) frequency-domain spectrum for 9 ml tap water in one measurement. The prepolarization field is 0.74 T.
(a) The average frequency-domain NMR spectrum in ten replicate scans. (b) The average frequency-domain spectrum by using the LIA technique in ten replicate scans.
(a) The chemical structure of trimethyl phosphate; (b) the frequency-domain spectrum for 9 ml trimethyl phosphate in a single measurement in the Earth’s field; (c) the frequency-domain spectrum after signal enhancement by LIA on ten replicate scans; and (d) the frequency-domain spectrum after 10-average using FAA.
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