目的　分析天南星中脂肪酸类成分。方法　应用气相色谱与质谱联用技术 ,对天南星石油醚提取部位的甲酯化合物进行分析。结果　在柱长 30m , 0 2 5mm的DB5MS玻璃毛细管柱 ,载气为He气 ,程序升温的条件下 ,分离得到 10 0个色谱峰。结论　检索NIST质谱库 ,鉴定了其中的 4 1个成分 Objective To analyze the fatty acids in Araceae. Methods Gas chromatography and mass spectrometry were used to analyze the methyl esters of Arisaema oil ether extracts. Results On the DB5MS glass capillary column with a column length of 30m and 0 25mm, the carrier gas was He gas. Under the conditions of temperature program, 10 0 peaks were obtained. Conclusion The NIST mass spectral library was searched and 41 of them were identified.