中文摘要：

采用在线热裂解-气相色谱/质谱（Py-GC/MS）联用技术研究了氦气氛围中葫芦巴净油在300、400、500、600、700、800℃下的热裂解行为。结果表明：①在上述条件下共鉴定出86种裂解产物,主要是酯、酸、醇、烯烃类化合物;②裂解温度低于500℃时,检测到的成分基本相同;③裂解温度从600℃升至800℃,检测到危害性的苯系物种类增多、相对含量增大。此外,对葫芦巴净油裂解产物的致香机理和苯系物的形成机理进行了简单讨论。

英文摘要：

Fenugreek absolute was pyrolyzed under helium atmospheres at 300,400,500,600,700 and 800 ℃,respectively.The pyrolysates were analyzed by on-line gas chromatography/mass spectrometry （GC/MS）.The results showed that,first,eighty-six constituents were identified,and the major of the pyrolysates were esters,acids,alcohols and alkenes.Second,the pyrolysates were almost same at lower temperature （300-500 ℃）.Third,more and more benzene derivates were identified with higher per-centage with increasing temperature （600-800 ℃）.In addition,the flavor mechanism and the attribu-tion of benzene compounds were investigated.