两个品种龙眼果汁芳香及营养成分测定与分析

Determination and analysis of aroma and nutrient components in fresh juices of two kinds of longan

本研究采用顶空固相微萃取-气质联用等方法对两个龙眼品种储良和石硖的果汁芳香成分及氨基酸、单糖和总糖进行测定及分析。结果表明:虽然储良和石硖果汁的芳香成分均主要为萜烯类、醇类、酯类等,并且两者都富含γ-氨基丁酸和糖,但利用电子鼻能很好地区分这两个龙眼品种。

By the application of headspace solid phase microextraction（ HS-SPME） coupling with gas chromatography mass spectrometry（ GC-MS）,the aroma constituents,amino acid,monosaccharide and total sugar content in two kinds longan juice,which were made from Chuliang and Shixia breed were measured and analyzed in this study. Results indicated the primary aroma constituents in these two juices were terpenes,alcohols and esters,with abundant contents of γ-aminobutyric acid and sugar,however,the electronic nose technology was superior in distinguishing these two different breeds of longan.