某些草药及其水煎液中镉、铅和其他微量元素的有害含量
The Hazard Content of Cadmium, Lead, and Other Trace Elements in Some Medicinal Herbs and Their Water Infusions.
作者信息
Ababneh Fuad A
机构信息
Chemistry Department, College of Science, Al-Hussein Bin Talal University, Ma'an, Jordan.
Chemistry Department, College of Science, Al Imam Mohammad Ibn Saud Islamic University (IMSIU), P.O. Box 90950, Riyadh 11623, Saudi Arabia.
出版信息
Int J Anal Chem. 2017;2017:6971916. doi: 10.1155/2017/6971916. Epub 2017 Oct 19.
54 samples belonging to 23 herbal species (15 individuals and 8 mixtures) were analyzed for their contents of heavy metals in the raw materials and in their water infusions. Trace and toxic elements in these samples were determined by using inductively coupled plasma-atomic emission spectrometry (ICP-OES) following acid digestion. The order of decreasing mean metal concentrations in raw materials (mg/kg) was found to be as follows: Fe (440) > Mn (162) > Zn (45.8) > Cu (12) > Pb (10.4) > Ni (5.4) > Cr (2.9) > Co (0.91) > Cd (0.5). It was found that 21% of the analyzed samples contain both Cd and Pb above their permissible limits. However, the infusions produced from these plants were found to contain fewer amounts of metals than the raw materials. Studied metals had the following mass transfer percentages to the infusion solutions (Fe: 3.5%, Cd: 14%, Cr: 15%, Pb: 20%, Co: 29%, Ni: 31%, Zn: 36%, Cu: 48%, and Mn: 53%). The estimated daily intake calculated for the toxic elements Pb and Cd through the consumption of herbal infusions was far below the tolerable daily intake set by the World Health Organization (WHO).
对属于23种草药物种（15种单一草药和8种混合草药）的54个样本的原材料及其水煎剂中的重金属含量进行了分析。采用电感耦合等离子体原子发射光谱法（ICP - OES）在酸消解后测定这些样本中的痕量和有毒元素。发现原材料中平均金属浓度（mg/kg）从高到低的顺序如下：铁（440）＞锰（162）＞锌（45.8）＞铜（12）＞铅（10.4）＞镍（5.4）＞铬（2.9）＞钴（0.91）＞镉（0.5）。结果发现，21%的分析样本中镉和铅的含量均高于其允许限量。然而，发现这些植物制成的水煎剂所含金属量比原材料少。所研究的金属向浸出液中的传质百分比如下（铁：3.5%，镉：14%，铬：15%，铅：20%，钴：29%，镍：31%，锌：36%，铜：48%，锰：53%）。通过饮用草药浸剂计算出的有毒元素铅和镉的估计每日摄入量远低于世界卫生组织（WHO）设定的每日耐受摄入量。
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