3种不同等级遵义红茶香气成分差异分析

Analysis of difference of aroma components in 3 different grades of Zunyi black tea

中文关键词:  遵义红茶  不同等级  香气成分  气相色谱-质谱法

英文关键词:Zunyi black tea  different grades  aroma components  gas chromatography-mass spectrometry

中文摘要:

      目的 探究遵义红的主要香气成分, 对比分析不同等级遵义红茶的香气成分差异。方法 采用固相微萃取-气相色谱-质谱技术对不同等级遵义红茶的香气成分进行测定并对其香气成分差异进行分析。结果 本研究共检测出遵义红茶中54种香气成分, 其中以醇类、酯类和烃类为主, 有少量的酮类、醛类、酚类以及酸类; 3种不同等级遵义红茶中大部分香气组分含量水平具有显著差异, 如: 香叶醇、反式-橙花叔醇、橙花叔醇、棕榈酸甲酯、左旋-β-蒎烯、δ-杜松萜烯、茉莉酮、3-羟基-L-络氨酸等40多种香气成分; 结合热图分析结果, 得出遵义红茶香气成分的相对含量大致分布为尊品>精品>特级。结论 本研究明确了不同等级遵义红茶香气成分组成与差异, 为优化遵义红茶品质提供理论基础。

英文摘要:

      Objective To explore the main aroma components of Zunyi black tea, compare and analyze the differences of aroma components in different grades of Zunyi black tea. Methods The aroma components of different grades of Zunyi black tea were determined by solid phase microextraction-gas chromatography-mass spectrometry, and their differences were analyzed. Results A total of 54 kinds of aroma components in Zunyi black tea were identified, the predominant ones being alcohols, esters and hydrocarbon, with a small amount of ketones, aldehydes, phenols and acids. More than 40 kinds of aroma components with significant differences in different grades of Zunyi black tea, such as geraniol, trans-nerolidol, nerolidol, methyl palmitate, (1S)-(1)-β-pinene, δ-terpinene, jasmonone and L-3-hydroxytyrosine. Collectively, the heat map showed that the relative content of aroma components in Zunyi black tea was roughly distributed as emperor grade>boudique grade>premium grade. Conclusion This study has clarified the composition and difference of aroma components of different grades of Zunyi black tea, which provides a theoretical basis for the optimization of Zunyi black tea quality.