三种固相微萃取头对厚皮甜瓜果汁香气成分萃取效果分析

Comparison of Three Solid Phase Microextraction Fibers for Aromatic Compounds in Muskmelon Juice

采用美国Supelco公司生产的CarboxenTM/PDMS、DVB/CAR/PDMS和PDMS/DVB 3种固相微萃取头萃取厚皮甜瓜(Cucumis melo L.)果汁中的香气成分,并用气质联用仪对香气成分进行检测。结果表明,3种萃取头检测到的香气成分均以酯类为主,醇类和醛类较少。CarboxenTM/PDMS萃取的香气成分相对含量达91.55%,特征香气成分相对含量达到63.01%;DVB/CAR/PDMS也可以全面萃取甜瓜香气,但香气成分与特征香气的相对含量及总峰面积比CarboxenTM/PDMS的低;PDMS/DVB萃取头吸附的香气成分种类最少,相对含量最低。可见,对厚皮甜瓜果汁香气成分的萃取以CarboxenTM/PDMS萃取头较好。

The arormtic compounds in muskmelon juice were extracted by three solid phase microextraction （SPME） fibers, such as Carboxen^TM/PDMS, DVB/CAR/PDMS and PDMS/DVB, respectively, and analyzed by CC-MS method. The results showed that the majority arowatic compounds were esters with a little of aldehydes and alcohols. The aromatic component relative content was 91.55%, and the relative content of main aromatic components was 63.01% extracted by Carboxen^TM/PDMS fiber. Althought the aromatic components extracted by DVB/CAR/PDMS fiber were completely, the aromatic component relative content, relative content of main aromatic components and total peak areas were lower than those by Carboxen^TM/PDMS fiber. The aromatic components extracted by PDMS/DVB fiber had little kinds with low relative content. It suggested that the Carboxen^TM/PDMS fiber was the most suitable for extracting amomatic compounds in muskmelon juice.