100 concentrated chinese medicine preparations were purchased randomly from market in Taiwan area. These samples including 20 kinds of prescriptions were made by 5 different manufactures. These total ash and acid-insolubed ash were determined by the methods descriped in ch. p Ⅲ. The results showed that the total ash of 93% of the samples were under 10% and the acid-insolubed ash of 84% of the samples were under 2%.