用电感耦合等离子体质谱法测定中草药中重金属元素
Determination of Heavy Metal Elements in Chinese Traditional Herbs by ICP-MS
摘 要
建立了用电感耦合等离子体质谱法(ICP-MS)测定中草药中重金属元素(砷、铅、镉、铬、汞、镍)的方法.中草药样品用硝酸和过氧化氢经微波消解后,消化液直接用ICP-MS同时测定6种重金属元素.以钪、钇、铟和铋作为内标物质,补偿了基体效应;选择适当的待测元素同位素克服了质谱干扰;6种重金属元素的检出限在0.001~0.006 μg·L-1之间,回收率在90%~107%之间,相对标准偏差小于3.2%.
中草药
重金属元素
ICP-MS
Chinese traditional herb
Heavy metal elements
Abstract
An ICP-MS method was proposed for the determination of heavy metal elements: As,Pb,Cd,Cr,Hg and Ni in Chinese traditional herbs.The herb sample was digested with HNO3-H2O2 in a closed vessel in microwave digestor.The analytes in the sample solution were then determined by ICP-MS.Sc,Y,In and Bi were selected as the internal standards to compensate matrix effects.Approprate isotopes of the elements determined were selected to eliminate MS interferences.Working conditions were optimized.DL of the analytes was in range of 0.001-0.006 μg·L-1.Recovery were in the range of 90%-107% and RSD′s found were less than 3.2%.
中图分类号 O657.31
所属栏目 工作简报
基金项目 云南省自然科学基金(05E024M)和云南省中青年学术带头人基金(2005PY01-32)资助项目
收稿日期 2007/6/24
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备注胡秋芬(1973-),女,云南玉溪人,教授,从事分析化学教学研究工作.
引用该论文: HU Qiu-fen,HUANG Qi-lin,ZHOU Yuan-qing,WU Xian-hua. Determination of Heavy Metal Elements in Chinese Traditional Herbs by ICP-MS[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2008, 44(12): 1213～1214
胡秋芬,黄齐林,周元清,吴献花. 用电感耦合等离子体质谱法测定中草药中重金属元素[J]. 理化检验－化学分册, 2008, 44(12): 1213～1214
被引情况:
【1】王蔚育, "电感耦合等离子体原子发射光谱法测定铅锑合金中锑",理化检验－化学分册 46, 795-796(2010)
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参考文献
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【2】Yang Yaling,Yang Guangyu,Lin Qiang.Determination of heavy metal in chinese herbal medicine by microwave digestion and RP-HPLC with uv-vis detection[J].Microchimica Acta,2004,144(4):341-346．
【3】王松君,曹林,常平,等.ICP-MS测定中草药狼毒中稀土和微量元素[J].光谱学与光谱分析,2006,26(7):1330-1333．
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【5】马强,胡海,刘颖,等.微波消解-石墨炉原子吸收光谱法分析中药中微量元素[J].吉林大学学报:理学版,2006,44(5):817-820．
【6】杨屹,侯翔燕,王书俊,等.微波消解-AAS法测芦荟中微量金属元素锌、锰、镉、铅[J].光谱学与光谱分析,2004,24(12):1672-1675．
【7】USA EPA method 200.8-1994Determination of trace elements in waters and water by inductively coupled plasma-mass spectrometry[S]．
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