DETERMINATION OF TRACE ELEMENTS AND HEAVY METAL IN DIFFERENT PARTS OF RABDOSIA RUBESCENS

Abstract

This paper is about simultaneous determining the contents of Zn, Mn, Fe, Cu, Cr, As, Cd, Pb in the leaves, stems and the whole plant of Rabdosia rubescens by establishing the methods of Microwave- Digestion and ICP-MS. The average sample-added recovery rate is between 97.09%~104.83% and its relative standard deviation (RSD) is between 1.12%~2.93%. The study shows that this method is simple, fast, and swift and it is suitable for the simultaneous determination of the trace elements and heavy metals in Rabdosia rubescens. The experiment results indicate that the contents of trace elements Mn, Fe, Zn which beneficial to the human body in every part of Rabdosia rubescens are all very high; among its heavy metals harmful to the human body, except that the content of Pb is a little higher, the contents of heavy metals Cu, Cr, As, Cd, Pb in every part of the plant are all lower than the standard amount restricted in Chinese Pharmacopoeia and The Import and Export Green Trade Standard of the Medicinal Plants and Their Products. This experiment result provides the scientific data for the further study of the relationship between the content of the trace elements, the heavy metals and their medicine efficacy, and it is also useful in development and application this natural medicinal resource.