Determination of mineral elements of Cistanche deserticola by the method of microwave digestion and ICP-OES

The samples were prepared by wet digestion procedure with HNO3/H2O2.The mineral elements in Cistanche deserticola from the Qing-Tibet Plateau were completely analyzed by inductively coupled plasma optical emission spectrometer(ICP-OES).The results showed there were 18 mineral elements in Cistanche deserticola including Na,K,Ca,P,S,Mg,Si,Al,Fe,Li,Ti,Sr,Mn,Zn,Cu,Ba,B and Cr.The RSD of the determining result was between 0.85% and 12.6%,and that of 14 elements was less than 5%.The mass fraction of Na,K,Ca,P,S and Mg,which are necessary macrometals in the human body,were 4.03%,1.23%,0.31%,0.32%,0.29% and 0.17%,respectively.The contents of Fe,Mn,Zn,Cu and Cr,which are necessary micrometals to the human body,were 788.3,16.87,15.29,7.18,1.24 mg/kg,respectively.These results provide some reference in relative research of Cistanche deserticola.