[C:1]([O-:14])(=[O:13])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH3:12].[CH3:15]C(C)=O>>[C:1]([O:14][CH3:15])(=[O:13])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH3:12]As internal standard, 0.06 g of methayl laurate and 2 g of a sample were prepared and dissolved in 4 g of acetone, and the obtained solution (2 μL) was introduced to a device. An analytical curve was formed from the peak area of the internal standard, and the peak area obtained when the concentration of methyl laurate was changed, and an amount of an unreacted component contained the sample was determined.
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