| The contents of twelve mineal elements, including K, Na, Ca, Mg, Fe, Zn, Cu, Mn, Se, Pb, Cd and Cr in Chinese yam samples were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) with microwave digestion. This method is rapid, stable, accurate, and suitable for rapid determination of multiple elements in food samples. The results indicated that Chinese yam are rich in?the elements which are benefitical to human body, such as K,?Ca, Fe,Mg,?Zn and Mn. Fortunately, the contents of Pb, Cd and Cr does not exceed the national food hygiene standards. |