摘要
采用微波消解-火焰原子吸收光谱法测定贵定云雾绿茶中微量金属元素Fe,Zn,Ni,Se和Mn的含量及其溶出特性。对云雾绿茶中5种微量金属元素进行加标回收试验,加标回收率在93.67%~102.36%之间,相对标准偏差在0.57%~1.67%之间。对云雾绿茶进行不同浸泡时间和不同冲泡次数微量元素的溶出研究。实验结果表明,云雾绿茶中微量元素的溶出量呈现随浸泡时间的延长而增加的趋势,随冲泡次数的增多,云雾绿茶中的微量元素溶出量逐渐减少。方法简便,灵敏,适合常规分析。
The contents and extracting characteristic of Fe, Zn, Ni, Se and Mn in Guiding Yunwu green tea were determined by microwave slaking and flame atomic absorption spectrometry （FAAS） in this study. The recovery relation of testing method was 93.67 %-102.36 % and the relation error was 0.57 %-1.67 %. The soaking time and times were analyzed. The result Yunwu green tea show a increasing trend with the ,this method simple and sensitive is suitable for soaking time, but decreasing trend with the soaking times routine analysis.
出处
《食品研究与开发》
CAS
北大核心
2015年第5期75-78,共4页
Food Research and Development
关键词
贵定
云雾绿茶
微量元素
溶出特性
Guiding
Yunwu green tea
trace element
extracting characteristic
