食品科学 ›› 2013, Vol. 34 ›› Issue (2): 227-230.

• 分析检测 • 上一篇    下一篇

重庆地区茶叶矿质元素产地特性研究

唐偲雨1,彭光宇2,王晶王国民2,刘毅童华荣4   

  • 收稿日期:2011-10-14 修回日期:2012-12-03 出版日期:2013-01-25 发布日期:2013-01-15
  • 通讯作者: 童华荣 E-mail:huarong@126.com

A study of tea in Chongqing region on mineral elements indicates their producing area characters

  • Received:2011-10-14 Revised:2012-12-03 Online:2013-01-25 Published:2013-01-15

摘要:

采用微波消解技术处理来自重庆不同地区的22只茶鲜叶蒸青样,利用电感耦合等离子光谱和质谱检测其32种矿质元素,发现重庆地区茶鲜叶中15种稀土含量随区域不同差异大,其余17种元素含量在几十μg/kg到几千mg/kg不等。主成分分析表明:永川地区样品Y、Pr、Nd、Eu、Gd、Tb、Dy、Ho、Er、Fe元素含量比其他地区样品含量低;巴南、南川样品Sr、Al、Ca元素含量最低,永川、荣昌样品这3种元素含量最高;其他地区样品在样品分值图上得分分散。结合聚类分析,22只样品聚为6类,地域相近样品具有一定相似性。研究表明,利用矿质元素区分茶叶产地特性是可行的,稀土元素含量以及Ca、Sr、Ba、Al元素为产地特性提供重要依据。

Abstract:

22 enzymes deactivated tea samples gathered form different regions of Chongqing, were microwave digested, and then detected their 32 kinds of mineral elements by ICP-OES and ICP-MS. Result shows quantity of 15 rare-earth elements vary obviously among samples from different regions, the other 17 elements’ content are in the range of several μg to several mg per kilogram. principal component analysis shows that the content of Y, Pr, Nd, Eu, Gd, Tb, Dy, Ho, Er, Fe in Yong Chuan samples are less than other samples; Sr, Al, Ca is found lowest in Ban Nan and Nan Chuan samples, while the highest in Yong Chuan and Rong Chang; samples of other regions were decentralize on the score chart. Then combined with cluster analysis, 22 tea samples was clustered into 6 with a certain degree of similarity during a certain same produing region. The study indicated that determining tea Origin characteristics by mineral elements is feasible. Rare-earth elements' content and Ca、Sr、Ba、Al provide major base to determine provenance of tea.

中图分类号: