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  

Determination of Trace Elements in Lophatherum Gracile Brongn from Different Habitat by Microwave Digestion-Atomic Absorption Spectroscopy

作　　者：袁珂[1] 薛月芹[1] 桂仁意[1] 孙素琴[2] 殷明文[3] 

机构地区：[1]浙江林学院天然药物研发中心,浙江临安311300 [2]清华大学化学系,北京100084 [3]郑州大学化学系,河南郑州450052

出　　处：《光谱学与光谱分析》2010年第3期804-808,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(40871116);浙江省森林培育重中之重学科开放基金项目(200510)资助

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,适合于淡竹叶中微量元素的测定。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《中国药典》、《药用植物及其制剂进出口绿色行业标准》及《国家标准食品卫生标准》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。A method of microwave digestion technique was proposed to determine the content of Zn, Fe, Cu, Mn, K, Ca, Mg, Ni, Cd, Pb, Cr, Co, Al, Se and As in lophatherum 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 lophatherurn gracile brongn. The experimental results also indicated that different areas＇ lophantherurn gracile hrongn 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 lophantherum 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.

关 键 词：微波消解 原子吸收光谱法 淡竹叶 微量元素 

分 类 号：Q657.3[生物学—生物物理学]