GC法同时测定麝香壮骨膏中樟脑、薄荷脑、冰片和水杨酸甲酯的含量

目的:建立同步测定麝香壮骨膏(樟脑、薄荷脑、冰片等)中樟脑、薄荷脑、冰片和水杨酸甲酯等4种成分含量的气相色谱方法。方法:挥发油测定器蒸馏制备供试液,以萘为内标物。PEG-20M为固定相的毛细管柱,氮气作为载气,FID检测器,采用程序升温,内标法测定样品中4种成分的含量。结果:麝香壮骨膏中的樟脑、薄荷脑、冰片(龙脑和异龙脑)和水杨酸甲酯及内标物萘等5种物质在同一色谱条件下获得良好分离,樟脑、薄荷脑、冰片和水杨酸甲酯的回收率依次为96.92(RSD=2.42),98.03(RSD=1.81),99.02(RSD=1.47)和98.15(RSD=1.59)。采用此方法对麝香壮骨膏的6个不同厂家的产品进行含量测定,均可取得满意的结果。结论:该方法简便、准确、分离度好,可用于控制麝香壮骨膏的质量。

Simultaneous determination of camphor, menthol, synthetic borneol and methyl salicylate in Shexiang Zhuanggu Plaster by GC

AIM: To establish the simultaneous determination of camphor,menthol,synthetic borneol and methyl salicylate in Shexiang Zhuanggu Plaster(Camphor,Mentholum,Borneolum Syntheticum,etc). by GC. METHODS: The sample solution was distilled in volatile oil determination apparatus.Naphthalene was used for the internal standard.The GC system consisted of capillary column,PEG-20M as the stationary phase,nitrogen as the carrier gas,FID as the detector.The programmed temperature-GC and internal standard method was employed to determine four kinds of components in Shexiang Zhuanggu Plaster. RESULTS: Camphor,menthol,synthetic borneol(borneol and isoborneol) and methyl salicylate in Shexiang Zhuanggu Plaster and naphthalene have been separated well under the same chromatographic condition.The average recovery of camphor,menthol,synthetic borneol and methyl salicylate were 96.92%(RSD=2.42%),98.03%(RSD=1.81%),99.02%(RSD=1.47%) and 98.15%(RSD=1.59%),respectively. CONCLUSION: The method is simple,accurate and separable,and can be used to control the quality of Shexiang Zhuanggu Plaster