野生曼陀罗重金属含量及其安全性评价

为探明野生曼陀罗各器官不同生育期金属含量状况,进而为其人工栽培选择合适生境及用药安全性提供科学依据,采用原子分光光度计法,分别对不同生育期采集的野生曼陀罗的根、茎、叶、果实等器官中(Pb,Cd,Hg,As,Cu,Fe,Mn,Zn,Cr,Ni)的含量进行分析测定。结果表明:1)不同生育期曼陀罗根、茎、叶和果实中的As、Hg、Cd和Pb的含量分别为0.11～1.16mg/kg、0.018～0.086mg/kg、0.021～0.19mg/kg和0.42～4.63mg/kg,与药用植物及制剂进出口绿色行业标准相比,均未超过对应元素的安全值。2)Cu在成熟叶片、成熟果实、成熟根、幼果和幼根中的含量分别为35.1mg/kg、26.0mg/kg、26.4mg/kg、23.9mg/kg和20.7mg/kg,均超过安全值(为20.0mg/kg),其中,成熟叶片中的含量超标严重,比安全值高75.5%,其他器官超标甚微。

Contents of Heavy Metals in Wild Datura stramonium and Its Safety Evaluation

In order to know the contents of heavy metals in various organs of wild D.stramonium,so as to provide fundamental scientific data for habitat selection and drug safety in artificial cultivation of D.stramonium,the contents of ten heavy metals(Pb,Cd,Hg,As,Cu,Fe,Mn,Zn,Cr,Ni) in various organs(root,stem,leaf,fruit) were determined by atomic spectrophotometer method.The results showed that: 1) The contents of As,Hg,Cd and Pb in various organs in different growth period were 0.11~1.16 mg/kg,0.018~0.086 mg/kg,0.021~0.19 mg/kg and 0.42~4.63 mg/kg respectively.All of these did not exceed the safe values.2) The Cu contents in ripe leaves(35.1 mg/kg),ripe root(26.0 mg/kg),young fruits(26.4 mg/kg) and young roots(20.7 mg/kg) all exceeded the safe value(20.0 mg/kg),the Cu content in ripe leaves exceeded too much,75.5% higher than the safe value,and others exceeded slightly.