Determination of 7 Metal Elements in Two Kinds of Rhizoma Pridis by FAAS with Microwave Digestion

The 7 metal elements(calcium,potassium,magnesium,iron,zinc,copper and manganese)in two kinds of Rhizoma Pridis[Paris polyphylla Smith var.yunnanensis(Franch.) Hand.-Mazz.and P.polyphylla Smith var.chinensis(Franch.) Hara]were determined by FAAS with microwave digestion.The contents of macro and trace elements from the two kinds of Rhizoma Pridis were quite different.The concentrations of Ca,Mg,K and Cu in P.polyphylla Smith var.yunnanensis(Franch.) Hand.-Mazz.were higher than P.polyphylla Smith var.chinensis(Franch.) Hara.then the contents of Fe,Zn and Mn of the second one was higher than the first one.The relative coefficients were equal or greater than 0.9898,and the RSD were between 0.38% and 1.70%.The method is stable and reliable.And the experimental data provides a basis for the further development and utilization of Rhizoma Pridis resources.