食品科学

• 分析检测 • 上一篇    下一篇

汉中绿茶中6 种矿质元素含量及其溶出特性

党 娅1,2,刘水英1   

  1. 1.陕西理工学院生物科学与工程学院,陕西 汉中 723000;2.陕西省资源生物重点实验室,陕西 汉中 723000
  • 出版日期:2014-08-25 发布日期:2014-08-25
  • 基金资助:

    陕西省教育厅省级重点实验室项目(11JS031)

Mineral Contents and Leaching Characteristics in Green Tea from Hanzhong, Shaanxi

DANG Ya1,2, LIU Shui-ying1   

  1. 1. College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, China;
    2. Shaanxi Key Laboratory of Bio-Resource, Hanzhong 723000, China
  • Online:2014-08-25 Published:2014-08-25

摘要:

采用原子吸收光谱法测定汉中绿茶主栽地区的7 个品种茶叶消化液和茶叶水浸出液中Mn、Zn、Fe、Cu、Ni、Cr 6 种矿质元素的含量。以这些矿质元素的含量及其溶出率作为另一种分析评价汉中绿茶品质的依据,实验回收率在92.70%~102.55%之间,相对标准偏差在10%以下。结果表明:采用原子吸收光谱法能准确测定绿茶及绿茶水浸出物中的矿质元素的含量,且方法简单、快捷;从溶出率和矿质元素的含量来看,相对其他几个供试品种而言,有机锌硒茶、鹏翔茶粉、汉中仙毫和汉中绿茶品质较好。

关键词: 绿茶, 原子吸收光谱法, 矿质元素, 溶出率

Abstract:

The contents of six mineral elements including Mn, Zn, Fe, Cu, Ni and Cr in the digested solutions and infusions
of seven kinds of green tea from the main tea-growing region of Hanzhong, Shaanxi province were determined by atomic
absorption spectroscopy (AAS). The quality evaluation of green tea from Hanzhong was carried out with respect to mineral
contents and leaching rates. The recoveries for six metal elements were between 92.70% and 102.55% with relative standard
deviations less than 10%. The results showed that AAS enabled simple, rapid and accurate determination of mineral contents
in green tea and its infusion. Based on the mineral contents and leaching rates, the quality of organic zinc and seleniumenriched
tea, Pengxiang tea powder, Hangzhong Xianhao and Hanzhong green tea was better than that of other green tea
samples tested.

Key words: green tea, atomic absorption spectroscopy, mineral elements, dissolution rate

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