顶空固相微萃取法萃取茯砖茶挥发性成分条件的优化

为更好地分析茯砖茶挥发性成分组成特征，应用气相色谱-质谱联用（GC-MS）检测平台，探讨萃取头涂层、茶水冲泡比例、萃取温度和萃取时间对萃取结果的影响。结果表明：DVB/CAR/PDMS（50/30 μm）更适合萃取茯砖茶的挥发性成分；茯砖茶挥发性成分的最优萃取方法为：茶水比1∶0、萃取时间70 min、萃取温度80 ℃。在此试验条件下，利用顶空固相微萃取从试验用的茯砖茶中检测到75种挥发性成分，包括碳氢类20种，醛类16种，酮类13种，醇类12种，甲氧基酚类9种，酯类4种，酚类1种。本研究明确了陕西代表性茯砖茶挥发性成分的萃取方法，为全面解析茯砖的香气品质提供可靠技术支撑。

Optimization for Extraction of Volatile Compounds of Fuzhuan Tea by Headspace Solid-phase Microextraction

To better analyze the volatile compounds characteristics of Fuzhuan tea,the effects of different fiber coatings,tea to water ratio,extraction temperature and extraction time on extraction results were studied by gas chromatography-mass spectrometry (GC-MS). The results showed that DVB/CAR/PDMS (50/30 μm) was the most suitable for extracting the volatile components of Fuzhuan tea; the optimal combination of experimental parameters was:tea to water ratio (g/mL) 1∶2,the extraction time 70 min,and the extraction temperature 80 ℃. As a result,75 volatile components were identified from Fuzhuan tea,which include 20 hydrocarbons,16 aldehydes,13 ketones,12 alcohols,9 methoxyphenols,4 esters,and 1 phenols. The volatile extraction method for Shaanxi Fuzhuan tea was clarified in this study,which provided a technical support for analyzing the aroma quality of Fuzhuan tea comprehensively.