| 桑叶绿茶中微量元素含量及浸出特征研究 |
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| 引用本文： | 刘学,冯林,杨坚,黄先智.桑叶绿茶中微量元素含量及浸出特征研究[J].食品工业科技,2012(2):85-88. |
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| 作者姓名： | 刘学 冯林 杨坚 黄先智 |
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| 作者单位： | 1. 西南大学食品科学学院,重庆,400716
2. 西南大学科学技术处,重庆,400716 |
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| 基金项目： | 现代农业产业技术体系建设专项资金资助项目(nycytx-27-gw504) |
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| 摘 要： | 采用火焰原子吸收分光光度法测定桑叶绿茶中Ca、Mg、Cu、Mn、Zn、Fe六种元素的含量,并在不同冲泡时间和不同冲泡次数条件下研究了桑叶绿茶中微量元素浸出量。结果表明,桑叶绿茶中微量元素总含量顺序为Ca>Mg>Fe>Mn>Zn>Cu,浸出液中各元素浸出量顺序为Mg>Ca>Zn>Fe>Mn>Cu,其中Mg最易浸出,Cu最不易浸出;不同冲泡时间微量元素浸出规律可用对数关系描述,不同冲泡次数微量元素浸出规律可用负指数关系描述。研究桑叶绿茶中微量元素的浸出特性有助于进一步研究桑叶中各元素存在的形态,并可为桑叶绿茶相关产品的开发提供一定的实验依据。
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| 关 键 词： | 原子吸收 桑叶绿茶 微量元素 浸出特征 |
Study on extracting characteristics and total content of trace element in mulberry green tea by FAAS |
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| LIU Xue,FENG Lin,YANG Jian,HUANG Xian-zhi.Study on extracting characteristics and total content of trace element in mulberry green tea by FAAS[J].Science and Technology of Food Industry,2012(2):85-88. |
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| Authors: | LIU Xue FENG Lin YANG Jian HUANG Xian-zhi |
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| Affiliation: | 2,*(1.College of Food Science,Southwest University,Chongqing 400716,China;2.Division of Science & Technology,Southwest University,Chongqing 400716,China) |
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| Abstract: | The trace of elements such as cacium,magnesium,copper,manganese,zinc,iron in mulberry green tea were determined by flame atomic absorption spectrometry,each element extraction content in mulberry green tea were determined by different brewing time and different brewing times.The results showed that the order of each total element content was Ca>Mg>Fe>Mn>Zn>Cu and the order of extraction rate was Mg>Ca>Zn>Fe>Mn>Cu.The trace of element extracting characteristics in different brewing time can be described with logarithmic eauation,the characteristics in different brewing times can be described with exponential equation.The results could be as a theoretic basis for its depth exploitation. |
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| Keywords: | FAAS mulberry green tea trace element extracting characteristics |
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