航空育种牛膝中的微量元素和重金属含量分析

微量元素和重金属是评价中成药质量的重要指标。文章应用ICP-MS分析了航天育种牛膝中微量元素和重金属的含量。结果表明航天育成的牛膝中含有丰富的对人体有益的元素，特别是Ca，Fe，Zn，Mn，Cu，Se和Mo，含量分别达到9 182.252 μg·g-1·DW，310.5 μg·g-1·DW，24.718 μg·g-1·DW，18 416.97 ng·g-1·DW，5 518.97 ng·g-1·DW，1 747.692 ng·g-1·DW和211.87 ng·g-1·DW，这对人类健康意义重大。重金属（As，Pb，Hg，Cd和Cr）的含量分别是514.332 ng·g-1·DW，1 657.65 ng·g-1·DW，13.212 ng·g-1·DW，49.22 ng·g-1·DW和922.038 ng·g-1·DW，含量偏高但符合相关标准。除了品种以外，栽培中药材时选择优质的土壤和合适的栽培条件，是提高微量元素含量和有效控制重金属含量的重要措施。

Determination of Trace Elements and Heavy Metals in Spaceflight Achyranthes

Concentration of trace elements and heavy metals is an important aspect to appraise the quality of Chinese traditional medicine. Seven kinds of trace elements and five kinds of heavy metals in spaceflight achyranthes were analyzed by the method of ICP-MS. The results showed that spaceflight achyranthes contained many wholesome elements, such as Ca, Fe, Zn, Mn, Cu, Se and Mo, whose concentrations are 9182.252 microg x g(-1) x DW, 310.5 microg x g(-1) x DW, 24.718 microg x g(-1) x DW, 18416.97 ng x g(-1) x DW, 5518.97 ng x g(-1) x DW, 1747.692 ng x g(-1) x DW and 211.87 ng x g(-1) x DW respectively. But the content of heavy metals is also high, as the concentrations of As, Pb, Hg, Cd and Cr are 514. 332 ng x g(-1) x DW, 1657.65 ng x g(-1) x DW, 13.212 ng x g(-1) x DW, 49.22 ng x g(-1) x DW and 922.038 ng x g(-1) x DW respectively, which accords with the relevant standard.