[Ultrafiltration properties in preparing injections of Chinese medicinal herbs using a J-48 ultrafilter]

Four injections of single Chinese medicinal herbs and 3 medical solutions of pure substances showing impurities were prepared by J-48 ultrafilter. The retention rate of effective compounds and the clearance rate of impurity of each injection and solution before and after ultrafiltration were examined by a UV 265-FW Ultraviolet-spectrophotometer (Shimadzu, Japan).