‘紫娟’红茶和‘紫娟’普洱熟茶香气成分的分析

‘紫娟’红茶、‘紫娟’普洱熟茶都是用云南所特有的茶树特异新品种‘紫娟’(Camellia.sinensis var.assamica)的新梢加工而成的茶叶创新产品。本文采用同时蒸馏萃取法(SDE)与气相色谱-质谱法(GC-MS)技术检测了‘紫娟’红茶和"紫娟"普洱熟茶香气成分的组成与含量。结果表明:‘紫娟’红茶的香气成分由醇、醛、酸、酮、酯、内酯、含氮类和烃类等8类83种化合物组成,在主要的16个组分中,醇类及其氧化产物含量最高,平均含量为62.538%;其次为醛类化合物,平均含量达21.031%。‘紫娟’普洱熟茶的香气成分由醇、醛、酸、酮、酯、内酯、酚类、烃类、含氮类和萜烯类等11类101种化合物组成,在主要的21个组分中,甲氧基苯类化合物含量最高,平均含量达19.077%;其次为脂肪酸类化合物,平均含量达12.210%。本研究结果对引导消费者正确认识‘紫娟’茶创新产品,促进云南茶产业的供给侧改革具有现实意义。

Aromatic Constituents of 'Zijuan' Black Tea and 'Zijuan' Pu-erh Tea

'Zijuan' Black Tea and 'Zijuan' Pu-erh Tea are new products which were made from new shoots of tea 'Zijuan' (Camellia sinensis var. assamica), a unique tea variety in Yunnan province, China. The aroma content and constituents of 'Zijuan' black tea and 'Zijuan' Pu-erh tea were determined by using simultaneous distillation and extraction (SDE) and gas chromatography mass spectrometry (GC-MS). The results showed that a total of 83 aromatic compounds were detected in the 'Zijuan' black tea, including alcohols, aldehydes, acids, ketones, esters, lactones, nitrogen compounds and alkenes. Among the 16 potent aroma compounds, the average content of alcohols and their oxidants was 62.538%, followed by aldehyde compounds with an average of 21.031%. A total of 101 aromatic compounds were found in the 'Zijuan' Pu-erh Tea, including alcohols, aldehydes, acids, ketone, esters, lactones, phenols, hydrocarbons, nitrogen and terpenes. Among the 21 potent aroma compounds, the average content of methoxy benzenes was the highest (19.077%), followed by fatty acid compounds (12.210%). These results could guide consumers to recognize the specialty of products of 'Zijuan' tea, and promote the supply-side reform of tea industry in Yunnan province.