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Determination of Menthol in Yanyan Lozenges by Gas Chromatography

OBJECTIVE To establish a GC method for the determination of menthol in Yanyan Lozenges. METHODS The samples were separated on a HP-FFAP capillary column( 30 m × 0. 32 mm × 0. 25μm),FID was used as detector with eucalyptol as internal standard. RESULTS The linear range of menthol was 5. 3 ~ 106μg·m L- 1( r = 0. 9997),the average recovery was 97. 7%,RSD = 0. 7%( n = 6). CONCLUSION This method is simple,reliable,accurate and can be used for the quality control of the drug.