The menthol, menthone, iso-menthone and menthate in methacious oil were analyzed by gas Chromatography with DEGS and PEG20M as stationary phases.

• 采用气相色谱法,选用DEGS和PEG20M固定液联合作固定相分离薄荷醇、薄荷酮、异薄荷酮、薄荷酯;