Determination of Menthol,Borneol and Thymol in Zhiyang Xiaoyanshui by GC

OBJECTIVE To establish a GC method for simultaneous determination of three constituents in Zhiyang Xiaoyanshui containing Menthol,Borneol and Thymol.METHODS The internal standard method was employed;Flame ionization detector and capillary column HP-INNDWA