摘要
目的采用气相色谱-质谱连用(GC-MS)法测定在空气中放置不同时间的决明子脂肪油的组成,探索其稳定性并推测其变化过程。方法色谱条件:HP-5 MS柱(30 m×0.25 mm×0.25μm),载气He;汽化温度240℃;程序升温:150℃→280℃。质谱条件:EI电离,电压70 eV;GC-MS界面温度260℃;扫描围:201~450 amu。结果从决明子的脂肪油中,分离并鉴定了34个化合物。结论决明子脂肪油中主要含有十八碳二烯酸、(Z)-9-十八碳烯酸、十六酸、十八酸、二十酸、二十二酸、二十四酸,占总脂肪油的94.53%;决明子油放置不同的时间后,其组成虽有所变化但仍然相对稳定,其中不饱和脂肪酸的同分异构体间存在互变消长关系,特别是油酸、亚油酸、棕榈酸等活性物质会随着放置时间的增加而含量减少。
Objective GC-MS Analysis of the chemical components of fatty oil from Semen cassiae. Constitutions of Semen cassiae fatty oil exposed in the air for dif- ferent phase was analyzed to explore their stability and change processes. Methods Chromatographic conditions : HP-5 MS column ( 30 m × 0.25 mm × 0.'25 μm) , the carrier gas was helium; The injector temperature Was 240 ℃ ; temperature program: 150℃ - 280 ℃. Mass septrometric conditions: El ioniza- tion, Voltage 70 eV ; GC-MS interface temperature of 260 ℃; Mass rang was in the range of m/z 201 - 450 amu. Results Thirty four kinds of essential compo- nents were identified from the fatty oil. Conclusion The major constituents were linoleic acid, (z) -9-octadecenoic acid, palmitic acid, octadecanoic acid, arachidic acid, docosanoie acid, tetracosanoic acid, which constitute 94.53 % of the whole fatty oil ; Being placed in the air for some time, fatty oil' s composition changed, but remained relatively stable. In which unsaturated fatty acids are tautomerism and demonstrates one increased, another reduced. Especially oleie acid, linoleic acid, palmitic acid and other active substances.
出处
《上海中医药杂志》
2012年第7期78-81,共4页
Shanghai Journal of Traditional Chinese Medicine
关键词
决明子
脂肪油
气质联用
组成
稳定性
Semen cassiae
Fatty oil
Gas Chromatography-Mass Spectrometry
Component
Stability