为了研究灵香草浸膏的热裂解行为，采用在线有氧热裂解-冷阱捕集-气相色谱-质谱联用技术，模拟卷烟燃吸状态对灵香草浸膏进行了热裂解分析，并对灵香草浸膏热裂解前后的挥发性成分进行了比较分析。从灵香草浸膏的热裂解产物中共鉴定出64种成分，占总峰面积的88.27％，主要成分为高级脂肪酸及其酯类；灵香草浸膏热裂解后的挥发性成分数量多于裂解前（45个），说明灵香草浸膏经热裂解生成了新的化合物。热裂解前后共有的化合物有20个，主要是高级脂肪酸及其酯类、新植二烯、5-（羟甲基）-2-呋喃甲醛、3-羟基-4，5-二甲基-2（5H）-呋喃酮等化合物。在线有氧裂解模式更接近烟用添加剂样品的真实裂解状态，操作简单、快捷，结果准确。
In order to study the pyrolytic properties of Lysimachia foenum-graecum Hance extract,it was pyrolysed and detected by online pyrolysis-gas chromatography-mass spectrome-try( Py-GC-MS). The pyrolytic experimental conditions were designed to simulate the real com-bustion conditions inside a burning cigarette. The sample was heated at 30 ℃/s from 300 to 900℃( held for 5 s)under the flow of 9% oxygen in nitrogen. The pyrolytic components and vola-tile components were compared. The results showed that 64 pyrolytic components were detec-ted,with 88. 27% of the total peak area,including linoleic acid ethyl ester(10. 33%),hexade-canoic acid,ethyl ester(9. 12%),9,12,15-octadecatrienoic acid,(Z,Z,Z)-(8. 03%),2-furan-carboxaldehyde,5-( hydroxymethyl)-( 6. 02%),neophytadiene( 5. 12%),heptadecanoic acid, ethyl ester( 4. 50%),acetic acid,phenyl ester( 3. 51%),5-methoxy-2,2-di-methylindan-1-one ( 2. 73%). The number of pyrolytic components was more than that of the volatile components , and 20 components were identified in both pyrolytic components and volatile components, including higher fatty acids and their esters, neophytadiene, 2-furancarboxaldehyde, 5-( hydroxymethyl)-,and 2( 5H )-furanone,3-hydroxy-4,5-dimethyl-. The on-line pyrolysis was similar to the real cigarette combustion conditions. The method is a simple,rapid and good qualitative method for the pyrolysis.
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