Abstract: In the normal methods of T₁ measurement, say IR method, problems of dynamic range will arise when a strong solvent signal and weak mean signals are present together, which will reduce the accuracy of T₁ measurement and it is quite difficult to combine the normal T₁ experiments with available methods of solvent peak suppression. In order to solve this problem, a modified IR method is provided in this paper to measure T₁ with suppression of strong solvent peak. Theoretical explanation, calculation and experimental results are given. It is proved that the accuracy of this new method is the same as the normal IR experiment.

Key words: T₁ measurement, solvent signal suppression, nuclear magnetic resonance