METHODS The contents of matrii sulfas exsiccatus and alumen exsiccatum were determined by gravimetric method and EDTA complexometric titration.

方法用重量法及EDTA络合滴定法对玄明粉和枯矾进行定量分析。

The catechin, ursolic were determined by HPLC.The polysaccharide and tannide were determined by sulphoacid-phenol and complexometric titration methods respectively.

用HPLC法测定儿茶素和熊果酸，硫酸-苯酚法测定多糖，络合滴定法测定鞣质的含量。