罗汉果浸膏的提取及其热裂解产物分析研究

为研究罗汉果浸膏的热裂解行为,通过气相色谱-质谱法(GC-MS)分析了罗汉果浸膏挥发性成分,并利用热裂解.气相色谱/质谱联用仪(Py-GC/MS)对罗汉果浸膏进行热裂解研究,对比分析了罗汉果浸膏裂解前后成分的变化.结果表明,罗汉果浸膏的香味成分主要有糠醛、糠醇、5.甲基糠醛、2,4-二羟基-2,5-二甲基-3(2H)-...

Extraction of Siraitia grosvenorii Extract and Analysis of Thermal Pyrolysis Products

In order to study the pyrolysis behavior of Siraitia grosvenorii extract,the volatile components of Siraitia grosvenorii extract were analyzed by gas chromatography-mass spectrometry(GC-MS),and the pyrolysis of Siraitia grosvenorii extract was carried out by the pyrolysis-gas chromatography/mass spectrometry(Py-GC/MS),and the composition changes before and after the pyrolysis of Siraitia grosvenorii extract were compared and analyzed.The results showed that the main aroma components of Siraitia grosvenorii extract are:furfural,furfuryl alcohol,5-methylfurfural,2,4-dihydroxy-2,5-dimethyl-3(2H)-furan-3-one,5-hydroxymethyl furfural and trans-squalene.The pyrolysis products of Siraitia grosvenorii extract at 300 ℃ are less,mainly butyraldehyde,isovaleraldehyde,and acetic acid;the pyrolysis products at 600 ℃,750 ℃ and 900 ℃ were significantly increased,and furans,ketones,olefins,nitrogen-containing heterocyclic compounds,benzenes and some other compounds were added compared with the original components of Siraitia grosvenorii and the pyrolysis products at 300 ℃.The types and contents of volatile components in the pyrolysis products of Siraitia grosvenorii extract increased compared with the original components,such as furans,ketones,olefins,nitrogen-containing heterocyclic compounds,etc.,and the content of organic acids such as acetic acid is lower than the original components.