摘要
目的测定鞣柳硼三酸散中鞣酸的含量。方法采用锌滴定液测定鞣酸、乙二胺四乙酸二钠回滴过量锌离子的络合滴定法测定鞣酸的含量。结果精密度试验的RSD为0.34%(n=5);平均回收率为99.56%,RSD=0.36%(n=9)。结论络合滴定法简便、快速、准确,可控制鞣柳硼三酸散中鞣酸的含量。
Objective To establish the determination method of the tannin content in Tannic Acid Salicylic Acid and Boric Acid Powder. Methods The tannin content was determined by complexometry with zinc titrant and sodium ethylenediamine tetraacetate for back titration of excessive zinc- ion. Results The accuracy test RSD was 0.34% (n = 5). The average recovery rate was 99. 56%, RSD was 0. 36%. Conclusion The method is simple, rapid and accurate, which can be used as the quality control method for the tannin content in Tannic Acid Salicylic Acid and Boric Acid Powder.
出处
《中国药业》
CAS
2010年第15期24-25,共2页
China Pharmaceuticals
关键词
鞣柳硼三酸散
鞣酸
络合滴定法
Tannic Acid Salicylic Acid and Boric Acid Powder
tannin
complexometric titration