中文摘要：

目的：采用GC—MS法对猫爪草中的脂肪酸进行分析。方法：使用RTX-5NS（30m×0．25mm，0．25μm）弹性石英毛细管色谱柱，采用程序升温，进样口温度为280℃，分流比为20：1，流速为1．1mL·min^-1，分析时间共20min，对猫爪草提取物的甲酯化样品进行GC—MS分析，质谱图用NIST谱库检索，鉴定各种脂肪酸，并用色谱峰面积归一化方法测定其相对含量。结果：鉴定出18种脂肪酸，主要成分亚油酸、软脂酸、油酸、亚麻酸和硬脂酸的相对百分含量分别为48．11％，21．37％，13．75％，8．86％，1．75％。结论：本法简便、快速，灵敏度高。

英文摘要：

Objective：To analyze the fatty acids in Radix Ranunculi Ternati with GC - MS method. Methods：The temperature programmed processes was performed on the column of RTX -5 MS （30 m×0. 25 mm, 0. 25 μm）with the duty time being 20 min, the temperature of injection port was set at 280 ℃, the split ratio at 20： 1, and the column flow rate at 1.1 mL·min^-1. The methyl esters were identified by comparing the mass spectra with those in NIST library, their relative contents were determined by using normalization method of chromatographic peak areas. Results： Eighteen fatty acids were detected. The relative contents of linoleic acid, palmitic acid, oleic acid, linolenic acid and stearlc acid were 48.11% ,21.37% , 13.75% ,8. 86% and 1.75% ,respectively. Conclusion：The GC - MS method is simple, rapid and sensitive for the determination of fatty acids in Radix Ranunculi Ternati.