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温度对固相微萃取法分析普洱熟茶香气的影响

发布时间:2018-04-30 03:28

  本文选题:普洱熟茶 + 顶空固相微萃取(HS-SPME) ; 参考:《食品工业》2017年12期


【摘要】:采用顶空固相微萃取(Headspace solid-phase microextraction,HS-SPME)结合气相色谱-质谱联用技术快速测定普洱熟茶香气成分。首先对5种萃取头进行考察,75μm PDMS/DVB表现出了较高的萃取效率。使用75μm CAR/PDMS,通过对不同温度条件下萃取香气成分的数量、种类进行比较,评价了不同温度条件下萃取普洱熟茶香气成分的效果。结果发现,不同温度条件下对普洱熟茶香气成分的萃取差别较大,50℃条件下萃取出化合物56种,醇类和醛类相对含量最高;60℃条件下萃取出68种,碳氢类相对含量最高;70℃条件下萃取出79种,酮类和酯类相对含量最高;80℃条件下萃取出70种,甲氧基苯类物质相对含量最高。主要贡献性香气成分累积峰面积80℃条件下最高,其次为70℃。该研究结果可为普洱熟茶不同种类香气成分的分析提供了理论依据。
[Abstract]:Headspace solid-phase microextraction HS-SPMEand gas chromatography-mass spectrometry (GC-MS) were used to determine the aroma components of Puer ripe tea. At first, 75 渭 m PDMS/DVB of 5 kinds of extraction heads showed high extraction efficiency. In this paper, 75 渭 m car / PDMS was used to evaluate the effect of extracting aroma components of Puer ripe tea at different temperatures by comparing the quantity and species of aroma components extracted at different temperatures. The results showed that 56 compounds were extracted at 50 鈩,

本文编号:1822882

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