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Abstract

A method serves for recording spin resonance spectra of test samples having at least three groups of spins. A first group is coupled to a second group, while a third group is uncoupled relative to the second group but has a spectral position, e.g. chemical shift, which is substantially identical only to that of the first group. For obtaining an isolated image of the signal of the first group, one suppresses the signal of the third group. A pulse sequence of three r.f. pulses (10, 13, 17) are irradiated upon the sample in a manner known as such. The second r.f. pulse (13 ) is applied in such a way that the magnetization of the spins of the first group and of the second group is transferred to a state of double-quantum coherence by coherence transfer. Then, a first magnetic gradient field pulse (15) of a predetermined pulse surface (.epsilon..sub.2), with dephasing effect for the double-quantum coherence, is exerted upon the sample. The third r.f. pulse (17) is adjusted in such a way that the double-quantum coherence is retransferred, by coherence re-transfer, to the single-quantum coherence, which is finally exposed to a second magnetic gradient field pulse (19), being rephasing for the spins of the first group (A) and having a pulse surface n times the pulse surface of the magnetic gradient field pulse (15).

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