A description is given of a method for determining the content of a first
component of a sample, which first component provides a first NMR signal
and has a first self-diffusion coefficient D.sub.1, the sample
additionally containing at least one further component which provides a
further NMR signal and has a larger self-diffusion coefficient D.sub.2,
in particular for determining the fat content of a hydrous sample, with
the aid of a low-resolution nuclear magnetic resonance (NMR) pulse
spectrometer, the sample being excited by a radio-frequency (RF)
excitation pulse and being exposed to a magnetic gradient field and to a
sequence of further refocusing RF pulses for generating spin echo
signals, the spin echo signals being detected and their amplitude values
being determined, from which a value for the content of the first
component of the sample is determined. The magnetic gradient field is not
switched off during the sequence of further refocusing RF pulses.
