桂西北传统中草药红丝线的重金属含量分析

目的]为了分析广西河池不同产地红丝线的产品质量安全状况，为进一步开发和利用桂西北这种特色植物资源提供基础数据。方法]测定了红丝线中镉、锰、铅、锌、铜等9种重金属元素含量，采用湿法消解———火焰原子吸收分光光度法测定红丝线中重金属元素 Cd、Mn、Pb、Fe、Cu、Zn的含量，用原子荧光光谱法测定红丝线中的 As、Hg、Se含量。结果]红丝线中的 Cd、Mn、Pb、Fe、Cu、Zn、As、Hg、Se 含量分别为：1.62～17.25、8.93～142.53、4.37～18.43、103.7～242.81、2.55～5.35、85.40～146.30、0.07～0.54、0.00～0.08、0.00～0.47 mg/kg。参照国家食品安全相关标准和药用植物及制剂进出口绿色行业标准，采自河池各地的大部分红丝线的重金属含量超标或达到临界值，其中， Cd、Pb、Zn含量超标比较严重。结论]土壤重金属污染对红丝线及其他食用植物产品质量安全影响问题值得高度关注。

lnvestigation of Heavy Metal Contents in Traditional Chinese Herbal Medicine Peristrophe roxburghiana Collected from Northwest of Guangxi

Objective] This study was conducted to evaluate the product quality and safety of Peristrophe roxburghiana_ col ected from different places in Hechi City, northwest of Gunagxi, so as to provide basic data for further development and uti-lization of the characteristic plant resource P. roxburghiana. Method] Contents of 9 kinds of heavy metals including Cd, Mn, Pb, Zn and Cu in the herb were deter-mined by the method of wet digestion-flame atomic absorption spectrophotometry and atomic fluorescence spectrometry, respectively. Results] Heavy metal contents of Cd, Mn, Pb, Fe, Cu, Zn, As, Hg and Se were 1.62-17.25, 8.93-142.53, 4.37-18.43, 103.7-242.81, 2.55-5.35, 85.40-146.30, 0.07-0.54, 0.00-0.08 and 0.00-0.47 mg/kg, respectively. According to the national food safety standards and Green Trade Standards of lmporting & Exporting Medicinal plants & Preparations, the heavy metal contents of the P. roxburghiana_samples col ected from different coun-ties in Hechi City exceeded standards or at the critical values. Among which, Cd, Pb and Zn contents of the samples are seriously higher than the standards. Con-clusion] Therefore, the impact of soil heavy metal pol ution on the safety of edible plants in the northwest of Guangxi should be highly concerned.