食品科学 ›› 2017, Vol. 38 ›› Issue (24): 60-67.doi: 10.7506/spkx1002-6630-201724010

• 成分分析 • 上一篇    下一篇

庐山云雾茶挥发性成分主成分分析及产地判别

刘晔,葛丽琴,王远兴   

  1. (南昌大学 食品科学与技术国家重点实验室,江西?南昌 330047)
  • 出版日期:2017-12-25 发布日期:2017-12-07
  • 基金资助:
    国家自然科学基金地区科学基金项目(31560478;31160321)

Analysis of Volatile Compounds and Geographical Origin Discrimination of Lu Mountain Clouds-Mist Tea by Principal Components Analysis

LIU Ye, GE Liqin, WANG Yuanxing   

  1. (State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China)
  • Online:2017-12-25 Published:2017-12-07

摘要: 以顶空固相微萃取法结合气相色谱-质谱联用技术对3?个不同产地庐山云雾茶挥发性成分进行测定。在庐山云雾茶样本中共鉴定出76?种挥发性成分,其中相对含量较高的有顺-3-己烯-1-醇(4.00%)、庚醛(3.87%)、苄醇(13.76%)、十一烷(11.21%)、芳樟醇(3.70%)、苯乙醇(14.41%)、雪松醇(5.37%)等。利用主成分分析方法寻找影响挥发性成分的主要因子。结果表明,提取了6?个主成分累计方差贡献率达到82.63%,3?个不同产地的庐山云雾茶能通过各自的化学特征被完全区分开。市场上随机采集茶叶样本,采用同样的方法对其进行产地判别。结果可以从试样中鉴定出相同产地的庐山云雾茶,判别率为100%。

关键词: 庐山云雾茶, 气相色谱-质谱法, 挥发性成分, 主成分分析, 产地判别

Abstract: The volatile compounds of Lu Mountain Clouds-Mist tea from three producing regions were investigated by headspace solid phase microextraction coupled to gas chromatography-mass spectrometry (HS-SPME-GC-MS). A total of 76 volatile components were identified from the samples, the predominant ones being (Z)-3-hexen-1-ol (4.00%), heptanal (3.87%), benzyl alcohol (13.76%), undecane (11.21%), linalool (3.70%), phenylethyl alcohol (14.41%), and cedrol (5.37%). Principal component analysis (PCA) was applied to find the main factors affecting the volatile components. The results showed that 6 principal components could reflect most of the information on Lu Mountain Clouds-Mist tea with a cumulative contribution rate of 82.63%. The tea samples from three different regions could be clearly discriminated based on their chemical properties. The geographical origin discrimination of tea samples collected randomly from a local market was also achieved by PCA. Lu Mountain Clouds-Mist tea from the same region could be identified with an accuracy of 100%.

Key words: Lu Mountain Clouds-Mist tea, gas chromatography-mass spectrometry, volatile compounds, principal component analysis, geographical origin discrimination

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