【摘要】 建立了半边莲中重金属及有害元素残留量的测定方法,并对重金属及有害元素的含量进行分析与污染评价。采用电感耦合等离子体质谱（ICP-MS）法,测定53批不同产地半边莲中重金属及有害元素的含量。运用SPSS 22.0软件分析半边莲中重金属及有害元素之间的相关性,并采用单因子指数法及内梅罗综合污染指数法对半边莲污染状况进行评价。结果表明半边莲中5种重金属元素的线性关系良好（r>0.99）,定量限为0.2368～21.24μg·kg^-1,回收率为90.17%～102.3%,准确度和精密度均符合痕量分析要求。除As与Cu在5%的置信水平上显著正相关外,Pb、Cd、As、Cu各元素之间在1%的置信水平上呈显著正相关,表明这4种元素在半边莲中的积累存在协同效应,而Hg元素与这4种元素没有明显的相关性。此外,半边莲中指标性成分香叶木苷、蒙花苷含量与各元素之间无显著性相关。半边莲中重金属及有害元素平均单项污染指数顺序为Pb>Cd>As>Hg,其中Cd、Pb、As为主要重金属污染物。半边莲样品中41批处于安全级别,内梅罗综合污染指数均值为0.64,整体处于安全级别。更多还原

【Abstract】 Methods for determination of heavy metal and harmful element residing in Lobelia were established. Contents of heavy metals and harmful elements were analyzed and pollution evaluation was carried out. Inductively coupled plasma mass spectrometry（ICP-MS） was used to determine the content of heavy metals and harmful elements in 53 batches of Lobelia from different origins. The SPSS 22.0 software was used to analyze the correlation between heavy metals and harmful elements in Lobelia, and the single factor index method and Nemerow comprehensive pollution index method were used to evaluate the pollution status of Lobelia. The results show that the five heavy metal elements in Lobelia have a good linear relationship（r>0.99）,the limit of quantification is 0.236 8～21.24 μg·kg^-1,the recovery rate is 90.17%～102.3%,and the accuracy and precision meet the requirements of trace analysis. Except for the significant positive correlation between As and Cu at the 5% confidence level, the Pb, Cd, As, and Cu elements have a significant positive correlation at the 1% confidence level, indicating that there is a synergistic effect in the accumulation of these four elements in the Lobelia, and the Hg element has no obvious correlation with these four elements. In addition, there are no significant correlations between the content of diosmin and linarin in Lobelia and all the elements. The order of the average single pollution index of heavy metals and harmful elements in Lobelia is Pb>Cd>As>Hg, and Cd, Pb, as are the main heavy metal pollutants. Among the Lobelia samples, 41 batches are at a safe level, and the average Nemerow comprehensive pollution index is 0.64,which is at a safe level at a whole.更多还原