Study on Distribution and Dynamic Accumulation of Inorganic Elements in Rubus chingii Hu and Rubus corchorifolius L.f.During Different Parts and Fruit Growth Stages
Objective To analyze the contents of 23 inorganic elements in Rubus chingii Hu(RCH)and Rubus corchorifolius L.f.(RCL)and explore the distribution and dynamic change of inorganic elements in RCH and RCL during different parts and fruit growth stages.Methods The samples were pretreated by microwave digestion method using HNO3 as the digestion solvent,and the contents of 23 kinds of inorganic element were determined simultaneously by ICP-MS method.Results The determination results of 23 kinds of inorganic elements all had a good linear relationship(r≥0.994 5).The recovery was 94.30%-106.81%,RSD≤3.62%.There were significant differences in the distribution of inorganic elements in different parts of RCH and RCL.Young leaves of RCH and RCL had the highest content of inorganic elements,followed by old leaves,roots,fruits,old stems and young stems.As for the analysis of inorganic elements in different stages of fruits,the amount of inorganic elements showed a decreasing trend with the ripening of fruits.Hg and Pt elements were not detected in RCH and RCL,and Pb was over-limited in RCH.Conclusion The method can be used for the determination of inorganic elements in RCH and RCL,providing a basis for the development and safe use of RCH and RCL resources,and providing basic data for further control of the quality of traditional Chinese medicine.