固相微萃取法分析凤凰单枞乌龙茶香气组分

Application of Solid Phase Microextraction on the Oolong Tea (Camellia sinensis cv. Fenghuangdancong) Aroma Analysis

本文以凤凰单枞乌龙茶(Camelliasinensis)为材料,采用固相微萃取(SolidPhaseMicroextraction,SPME)对其呈香组分进行研究。结果表明采用SPME萃取凤凰单枞乌龙茶香气组分,从桂花香型乌龙茶干茶样中检测出41种香气组分,而SDE法则检测到55种香气组分,两种方法都检测出高比例的芳樟醇、橙花叔醇、茉莉酸甲酯和吲哚。SPME法萃取了乌龙茶自身散发出的香气组分,避免了茶叶中易挥发或热不稳定的香气组分被破坏,减少了香气组分的测定误差和不稳定性。

Oolong tea （Camellia sinensis）, native to China, is a semi-fermentation with a good pleasant, fragrant and sweat taste. The aroma compounds, collected by solid-phase microextraction （SPME） and simultaneous distillation extraction （SDE）, were investigated. The major results are as fellows： Using SPME, 41 kinds of aroma compounds of Fenghuangdancong Oolong tea cvs. Guihua were identified, whereas 55 aroma compounds by SDE were determined, respectively. The major aroma compounds collected by both SPME and SDE were linalool, nerolidol, methyl jasmonate and indole. SPME exhibited advantages in collecting actual aroma compounds, preventing the breakdown of these aroma heat-instabile aroma compounds and maintaining a good analytic stability.