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超声搅拌悬浮液进样FAAS法测定茶叶中的微量元素
引用本文:翁棣.超声搅拌悬浮液进样FAAS法测定茶叶中的微量元素[J].光谱学与光谱分析,2004,24(11):1458-1460.
作者姓名:翁棣
作者单位:浙江大学环境与资源学院,浙江,杭州,310029
基金项目:国家自然科学基金(20247001)资助项目
摘    要:将超声搅拌悬浮液进样技术应用于火焰原子吸收光谱法,成功地测定了茶叶中铜、铁、锌、锰的含量,此法快速、简单、准确。样品在(80±2)℃烘干4h后,研磨过160目筛,然后加入5mL015%琼脂悬浮液,用超声搅拌混匀后直接上机测定。测定结果与传统湿法一致,t检验表明两者无显著性差异,相对误差<±096%。

关 键 词:超声搅拌悬浮液进样  测定结果  含量  上机  t检验  微量元素  FAAS法  茶叶  技术应用  烘干
文章编号:1000-0593(2004)11-1458-03
修稿时间:2003年5月6日

FAAS Determination of Trace Elements in Tea-Leaves Using Suspension Sampling with Ultrasonic Agitation
WENG Di School of Environmental and Resources Sciences,Zhejiang University,Hangzhou ,China.FAAS Determination of Trace Elements in Tea-Leaves Using Suspension Sampling with Ultrasonic Agitation[J].Spectroscopy and Spectral Analysis,2004,24(11):1458-1460.
Authors:WENG Di School of Environmental and Resources Sciences  Zhejiang University  Hangzhou  China
Institution:School of Environmental and Resources Sciences, Zhejiang University, Hangzhou 310029, China.
Abstract:It is known that some minerals and trace elements such as Cu, Fe, Zn and Mn are the necessary elements in human body. The lack of these elements can cause various diseases. Because tea contains all kinds of minerals and trace elements, drinking tea is healthy for people. In order to contrast teas of different sort grades and producing areas the minerals and trace elements in the tea have been determined using suspension sample introduction technique. To determine the content of trace elements in tea-leaves, samples were powdered and sieved after being heated at (80 +/- 2) degerees C for 4 hours. 5 mL 0.15% agar solution was added and mixed thoroughly with the samples by ultrasonic agitation. Then the prepared suspension of sample was directly introduced to FAAS for determination. The results of this method are consistent with those obtained by wet treatment method, and the relative deviation of treatment method is less than +/- 0.96%. The t-test shows that no difference was found. The present method is convenient, rapid and accurate.
Keywords:Suspension sample introduction technique  FAAS  Tea leaves  Trace elements  Ultrasonic agitation
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