Sampling and Monitoring of Biogenic Emissions by Eucalyptus Leaves Using Membrane Extraction with Sorbent Interface (MESI)
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- 作者：Limei Wang ; Heather Lord ; Rick Morehead ; Frank Dorman ; and Janusz Pawliszyn
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2002
- 出版时间：October 23, 2002
- 年：2002
- 卷：50
- 期：22
- 页码：6281 - 6286
- 全文大小：193K
- 年卷期：v.50,no.22(October 23, 2002)
- ISSN：1520-5118
文摘
Membrane extraction with sorbent interface (MESI) has been applied to monitor plant fragrancevolatiles emitted into indoor air. The main components of the MESI system are a membrane moduleand a trap, which can be connected directly to a GC or GC-MS for simultaneous multicomponentextraction and monitoring. A polydimethylsiloxane (PDMS) membrane and two different traps, PDMSand Tenax, as well as a DC current supply for trap desorption have been applied in this research.After the membrane module is placed in contact with the plant, the MESI/GC-MS providessemicontinuous characterization of volatile compounds emitted. The MESI device has been appliedto monitor the biogenic volatile organic compounds released during the first 8 h after a branch wascut from a Eucalyptus dunnii tree. The study demonstrates that the MESI system is a simple anduseful tool for monitoring changes in emission processes as a function of time.Keywords: Membrane extraction; sorbent interface; gas chromatography; mass spectrometry;fragrance volatiles; eucalyptus