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。
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.
出处
《食品工业科技》
CAS
CSCD
北大核心
2012年第2期85-88,共4页
Science and Technology of Food Industry
基金
现代农业产业技术体系建设专项资金资助项目(nycytx-27-gw504)
关键词
原子吸收
桑叶绿茶
微量元素
浸出特征
FAAS
mulberry green tea
trace element
extracting characteristics
