微波消解-原子吸收光谱法测定不同产地淡竹叶中微量元素的含量

摘要：利用微波消解技术处理样品,采用原子吸收光谱法测定了我国广东、湖北、湖南、重庆、广西、江苏、福建、浙江、安徽九个不同产区淡竹叶中Zn,Fe,Cu,Mn,K,Ca,Mg,Ni,Cd,Pb,Cr,Co,Al,Se,As 15种微量元素的含量.该方法的相对标准偏差(RSD)在1.23%～3.32%之间,平均回收率在95.8%～104.2%之间.研究表明,该方法简便、快速、灵敏,适合于淡竹叶中微昔元素的测定.试验分析结果表明,不同产地淡竹叶中微量元素的含量呈现地域性差异.各地区的淡竹叶中对人体有益的元素K,Mg,Ca,Fe,Mn含量普遍较丰富;对人体有害的重金属元素,除湖南产的淡竹叶中Pb的含量稍高,广东、安徽产的淡竹叶中Cu的'含量偏高外,其他产区的淡竹叶中有害重金属元素Cd,Cu,Cr,Pb,As的含量均低于、及的限量标准.该测定结果为进一步探讨淡竹叶中微量元素的含量与其功效的相关性提供了科学依据.Abstract：A method of microwave digestion technique was proposed to determine the content of Zn,Fe,Cu,Mn,K,Ca,Mg,Ni,CA,Pb,Cr,Co,Al,Se and As in lophatherurn gracile brongn of different habitat by atomic absorption spectroscopy.The RSD of the method was between 1.23% and 3.32%,and the recovery rates obtained by standard addition method were between 95.8% and 104.2%.The results of the study indicate that the proposed method has the advantages of simplicity,speediness and sensitivity.It is suitable for the determination of the contents of metal elements in lophatherum gracile brongn.The experimental results alto indicated that different areas lophantherum gracile brongn had different trace elements content.The content of trace elements K,Mg,Ca,Fe and Mn beneficial to the human body was rich.The content of the heavy metal trace element Pb in lophanlherum gracile brongn of Hunan province was slightly high.The content of the heavy metal trace element Cu in lophantherum gracile brongn of Guangdong province and Anhui province is also slightly higher.Beside,the contents of harmful trace heavy metal elements Cd,Cu,Cr,Pb and As in lophatherum gracile brongn of different habitat are all lower than the limits of Chinese Pharmacopoeia and Green Trade Standard for Importing and Exporting Medicinal Plant and Preparation and National Food Sanitation Standard.These determination results provided the scientific data for further discussing the relationship between the content of trace elements in lophantherum gracile brongn and the medicine efficacy. 作者： 袁珂[1]薛月芹[1]桂仁意[1]孙素琴[2]殷明文[3] Author： YUAN Ke[1]  XUE Yue-qin[1]  GUI Ren-yi[1]  SUN Su-qin[2]  YIN Ming-wen[3] 作者单位： 浙江林学院天然药物研发中心,浙江,临安,311300清华大学化学系,北京,100084郑州大学化学系,河南,郑州,450052 期 刊： 光谱学与光谱分析   ISTICEISCIPKU Journal： SPECTROSCOPY AND SPECTRAL ANALYSIS 年，卷(期)： 2010, 30(3) 分类号： Q657.3 关键词： 微波消解    原子吸收光谱法    淡竹叶    微量元素    Keywords： Microwave digestion    Atomic absorption spectrometry method    Lophatherum gracile    Trace elements    机标分类号： O65 R92 机标关键词： 微波消解    原子吸收    光谱法测定    不同产地    淡竹叶    中微量元素    含量    Absorption Spectroscopy    Microwave    Different    trace elements    different    heavy metal elements    results    有害重金属元素    Guangdong province    atomic absorption    determination of    Hunan province    Anhui province 基金项目： 国家自然科学基金，浙江省森林培育重中之重学科开放基金

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