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[Determination of nervonic acid in oral tonic by GC].

A method for determination of nervonic acid in oral tonic has been developed by gas chromatography. The samples were derivatized by BF3-CH3OH. Dinonyl phthalate was used as the internal standard. The calibration curve was linear over a range from 0.3 g/L to 3 g/L with a correlation coefficient of 0.9994. The average recovery of the method was 97.04% and the RSD was 0.90%. The method has been successfully applied to quality control of nervonic acid in oral tonic.