METHODS Kromasil C 18 column was used,mobile phase was MeOH Sodium acitate solution,benzoic acid was used as internal standard, the detection wavelength was 230 nmn.

• 方法 :采用KromasilC18柱 ；以苯甲酸为内标物 ；醋酸钠2 .；94g与稀醋酸 38