sulphoacid

1.By replacing sulphoacid and silver sulfate solution by combining acid of sulphoacid and phosphoric acid in the back-flow process,the time is shortened and analysis is quicker.

改用硫磷混合酸代替硫酸—硫酸银溶液进行回流操作可极大地缩短回流时间，提高分析速度，得结果。

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

用HPLC法测定儿熊果酸，硫酸-苯酚法测定多糖，络合滴定法测定鞣质的含量。