艾叶浸膏挥发性成分及其热裂解产物的全二维气相色谱飞行时间质谱分析

Analysis of volatiles and pyrolysis products in Artemisia argyi leaves extract by Comprehensive Two-Dimensional Gas Chromatography coupled to time-of-flight mass spectrometry

摘要:

本文应用全二维气相色谱飞行时间质谱分析了艾叶浸膏的挥发性成分，共检测到210种物质，鉴定出65种匹配度较高物质。其中主要为萜烯类物质及其氧化物。应用热失重技术(TG)分析了艾叶浸膏的热失重行为，TG曲线显示艾叶浸膏主要失重区域在145～643℃之间，其中145～465℃之间主要是挥发性及半挥发性物质的挥发，而在465～643℃发生复杂裂解反应。通过热裂解技术分析了艾叶浸膏在不同温度下的裂解产物，结果表明，艾叶浸膏中的挥发性成分包括萜烯类、醇类、脂肪烃类在300℃以下主要是通过蒸馏作用直接转移，而随着裂解温度升高至600～900℃，产生了呋喃等增香物质，同时也生成了羰基化合物、萘、茚等有害物质。

Abstract:

The comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry was applied to analyze the volatiles of Artemisia argyi leaves extract. 210 components were detected and 65 compounds were identified with high similarity. Most of them were terpenes and their oxygenated derivatives. The pyrolysis of the Artemisia argyi leaves extract was investigated with TG-DSC and pyrolysis apparatus. TG curve showed that the main weight loss occurred between 145～643℃, among which the volatiles lost at 145～465℃ and complex pyrolysis occurred at 465～643℃. The pyrolysis products of different temperatures were identified. The results showed that most of the volatiles including terpenes, alcohols and aliphatic hydrocarbons were directly transferred via distilling. Flavoring substances (furans) as well as harmful compounds (carbonyl compounds, naphthalene, indene) were generated at the pyrolysis zone of 600～900℃.