Medicinal herbs: A potential source of toxic metal exposure for man and animals in India
Medicinal herbs: A potential source of toxic metal exposure for man and animals in India
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DOI：
10.1080/00039890209602941
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发表时间：
2002-05-01
期刊：
影响因子：
--
通讯作者：
Dey, S
中科院分区：
文献类型：
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作者：
Dwivedi, SK;Dey, S
为探讨重金属进入人体和动物体内的可能性，对28种常用药用植物进行了重金属含量测定。这些植物材料是从传统治疗师和商业药物制造商使用的相同来源收集的。这些植物经过鉴定、认证和处理，用于有毒金属的分析。根据植物部分的药用价值，估计叶、茎皮、根或种子中的铅和镉含量。作者使用原子吸收分光光度计测定金属含量。草药中铅的平均浓度范围为2.624 ppm（标准差= 0.426）和32.757（标准差= 0.124 ppm），镉的浓度范围为0.056 ppm（标准差= 0.002）和0.419 ppm（标准差= 0.006）。有趣的是，重金属浓度（即，铅和镉）在叶中的含量高于茎皮和根，在种子中的含量最低。作者没有注意到关于印度常用药用植物中有毒金属允许水平的已发表报告;因此，作者难以确定有毒金属在药物引起的健康危害中的作用。然而，不同植物中有毒金属的存在导致了长期食用这些药用植物可能对健康有害的结论。
To explore the possibility of translocation of heavy metals into humans and animals, the authors studied 28 commonly used medicinal plants and estimated their heavy metal content. The plant materials were collected from the same sources used by traditional healers and commercial drug manufacturers. The plants were identified, authenticated, and processed for the analysis of toxic metals. Lead and cadmium levels were estimated in leaf, stem bark, root, or seeds, depending on the medicinal value of the plant portion. The authors used an atomic absorption spectrophotometer to determine levels of metals. The mean lead concentration in medical herbs ranged between 2.624 ppm (standard deviation = 0.426) and 32.757 (standard deviation = 0.124 ppm), and the cadmium concentration ranged between 0.056 ppm (standard deviation = 0.002) and 0.419 ppm (standard deviation = 0.006). Interestingly, the heavy metal concentrations (i.e., lead and cadmium) were higher in leaf than in stem bark or roots, and the lowest values were recorded in seeds. No published reports on the permissible level of toxic metals in commonly used medicinal plants of India have come to the authors' attention; therefore, it was difficult for the authors to determine the role of toxic metals in drug-induced health hazards. However, the presence of toxic metals in different plants led to the conclusion that prolonged consumption of such medicinal plants may be detrimental to health.