Abstract: A method of adjusting an excitation and detection circuit for nuclear magnetic resonance, the circuit comprising a probe (S) of the type comprising a single coil (L) for transmitting pulses to excite the nuclear spins of a sample immersed in a magnetic field and for detecting a resonance signal from said nuclear spins, said method being characterized by a step of tuning the resonant frequency in reception of said circuit to the Larmor frequency (f0) of the nuclear spins of the atoms that are to be detected. An excitation and detection circuit for nuclear magnetic resonance, said circuit being characterized in that it is adapted to implement an adjustment method as described above.

Abstract: The invention relates to an NMR analysis system and method for obtaining an NMR signal from a liquid solution enhanced in relation to the value that it would have on the basis of the thermodynamic equilibrium. It has been discovered in a surprising manner that if the spins of the cores of a highly-polarized polarization source and the spins of the cores of the liquid solution are irradiated such that a polarization transfer, such as a Hartmann-Hahn transfer, of the spins of the cores of the source to the spins of the cores of the liquid solution is carried out by means of a coherent coupling resulting from the dipolar field created by the cores of the source, an NMR signal of the liquid solution is obtained, said signal being significantly enhanced in relation to the value it would have on the basis of the thermodynamic equilibrium.

Abstract: A method of adjusting an excitation and detection circuit for nuclear magnetic resonance, the circuit comprising a probe (S) of the type comprising a single coil (L) for transmitting pulses to excite the nuclear spins of a sample immersed in a magnetic field and for detecting a resonance signal from said nuclear spins, said method being characterized by a step of tuning the resonant frequency in reception of said circuit to the Larmor frequency (f0) of the nuclear spins of the atoms that are to be detected. An excitation and detection circuit for nuclear magnetic resonance, said circuit being characterized in that it is adapted to implement an adjustment method as described above.

Abstract: The invention relates to an NMR analysis system and method for obtaining an NMR signal from a liquid solution enhanced in relation to the value that it would have on the basis of the thermodynamic equilibrium. It has been discovered in a surprising manner that if the spins of the cores of a highly-polarised polarisation source and the spins of the cores of the liquid solution are irradiated such that a polarisation transfer, such as a Hartmann-Hahn transfer, of the spins of the cores of the source to the spins of the cores of the liquid solution is carried out by means of a coherent coupling resulting from the dipolar field created by the cores of the source, an NMR signal of the liquid solution is obtained, said signal being significantly enhanced in relation to the value it would have on the basis of the thermodynamic equilibrium.