不同萃取头对鸭梨花挥发性成分的影响

为了解鸭梨花香的生理生态功能,采用顶空固相微萃取(HS-SPME)与气质联用(GC-MS)相结合的方法对鸭梨花朵香气成分进行分析,比较了65 μm PDMS/DVB和50/30 μm DVB/CAR/PDMS 2种不同涂层纤维的萃取头对鸭梨花朵香气成分的萃取效果和特点。结果表明,65 μm PDMS/DVB和50/30 μm DVB/CAR/PDMS 2种萃取头检测出的挥发物数量和种类分别为20种和41种、5类和10类物质,其中65 μm PDMS/DVB萃取头检测出的挥发性成分以烷烃类的种类和含量最高（烷烃类7种,38.63%）,而50/30 μm DVB/CAR/PDMS萃取头检测出的挥发物以烯类（烯类7种,41.16 %）和醇类（醇类7种,24.11%）为主要成分。根据萃取化合物的数量、种类和含量,50/30 μm DVB/CAR/PDMS萃取头更适于提取分析鸭梨花朵的香气成分。

Effects of Different Extraction Fibers on Volatile Compounds of Pyrus bretschneideri Flowers

To understand the physiological and ecological function of pear flower scents, the volatile compounds of Pyrus bretschneideri flowers were analyzed by headspace solid phase microextraction (HS-SPME) and GC-MS. The extraction effects and characteristics of 65 μm PDMS/DVB and 50/30 μm DVB/CAR/PDMS were compared. Results showed that the number and type of volatile compounds of pear flowers detected by 65 μm PDMS/DVB and 50/30 μm DVB/CAR/PDMS extraction heads were respectively 20 and 41 species, 5 and 10 types of substances, of which, alkane had the most kinds and the highest content (7 types, 38.63%) among the volatile organic compounds detected by 65 μm PDMS/DVB extraction heads, while alkenes (7 types, 41.16%) and alcohols (7 types, 24.11%) were the main compounds detected by 50/30 μm DVB/CAR/PDMS extraction heads. According to the number, type and content of extracted compounds, the 50/30 μm DVB/CAR/PDMS extraction heads are more suitable for extracting and analyzing the volatile compounds of pear flowers.