食品科学
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刘爱丽，沈 燕，龚慧鸽，李晶菁
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基金资助:
浙江省教育厅科研项目（Y201223773；Y201430915）
LIU Aili, SHEN Yan, GONG Huige, LI Jingjing
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摘要：
用硝酸-H2O2作消解剂进行微波消解，以电感耦合等离子体发射光谱法测定泰顺地区6 种茶叶中的Fe、Mn、Zn、Cd、Cu、Se、Pb、Co、Sn、V、Cr、Ni 12 种微量元素含量。结果表明：在优化条件下，茶叶样品中所测元素的加标回收率为92.0%～106.5%，相对标准偏差小于5.0%，测定方法简便、快速、准确。所测泰顺茶叶样品含有丰富的有益微量元素，Cd、Pb、Cr等重金属元素含量均低于相关的国家限量标准。
关键词: 茶叶, 微波消解, 电感耦合等离子体发射光谱法, 微量元素
Abstract:
The contents of twelve elements including Fe, Mn, Zn, Cd, Cu, Se, Pb, Co, Sn, V, Cr and Ni in tea leaves from Taishun county were determined by inductively coupled plasma-atomic emission spectrometry (ICP-AES). Tea samples were digested by microwave with HNO3-H2O2. The results showed the recoveries of twelve elements from spiked tea samples were in the range of 92.0%–106.5%, with relative standard deviations (RSD) less than 5.0% under the optimal conditions. The method is simple, rapid and accurate. The essential trace elements for human in Taishun tea samples were rich, while the contents of Cd, Pb and Cr in the tea samples were lower than the permitted levels in the national standards.
Key words: tea, microwave digestion, inductively coupled plasma-atomic emission spectrometry (ICP-AES), trace element
中图分类号:
O657.31
刘爱丽，沈 燕，龚慧鸽，李晶菁. 微波消解-ICP-AES法测定泰顺茶叶中的微量元素[J]. 食品科学, doi: 10.7506/spkx1002-6630-201524034.
LIU Aili, SHEN Yan, GONG Huige, LI Jingjing. Determination of Trace Elements in Tea from Taishun County by ICP-AES with Microwave Digestion[J]. FOOD SCIENCE, doi: 10.7506/spkx1002-6630-201524034.
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