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利用~(13)C-NMR方法测定植物油的脂肪酸组成虽已有报导,但测定误差往往较大。为了准确测定植物油的脂肪酸组成和缩短测量时间,我们利用FX-100 NMR谱仪,从样品的自旋-晶格弛豫时间(T_1)的缩短和核的NOE效应消除到仪器参数的选定等方面进行了探索。对选择的实验条件以亚油酸甲酯及混合标样进行验证。混合标样的实验值与实际配比值的统计标准偏差约为0.003～0.004,相对误差≈0.7％。
The determination of fatty acid composition of vegetable oils by ~ (13) C-NMR has been reported, but the measurement error is often large. In order to accurately determine the fatty acid composition of vegetable oils and to shorten the measurement time, we used the FX-100 NMR spectrometer to eliminate the spin-lattice relaxation time (T_1) and the NOE effect of the nucleus on the selection of instrument parameters Aspects of exploration. The selected experimental conditions were verified by methyl linoleate and mixed standard. The standard deviation of the experimental value of the mixed standard and the actual ratio is about 0.003 to 0.004 and the relative error is about 0.7%.