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H NMR relaxation can effectively measure moisture and fat in oil seed

the key problem is technology for identification of the contribution from these components respectively. The peanut mass change with hydrogenation is recorded for optimizing NMR measurement process. The CPMG(Carr-Purcell-Meiboom-Gill）technique was applied to obtain the NMR transverse relaxation of peanut and peanut oil samples

and the resonance relaxation spectrum was analyzed with the method of continuous spectrum iteration. According to the variation of relaxation spectrum peak area with peanut mass

the assignments of the relaxation peaks were determined with the results from peanut oil. The study found that the transverse relaxation spectrum peaks reflected the fat content in dry peanut. Compared with fat content measured with traditional technology

the peak areas for dry fresh peanut had a positive linear correlation with its fat concentration. The results demonstrate that the NMR transverse relaxation spectrum can be used for determination of fat content in fresh peanut.