The level of activity of immobilized penicillin acylase is the important factor which affects the speed of enzymatic synthesis of amoxicillin, thus it plays signiifcant role how to determine synthetic activity of immobilized penicillin acylase. Currently, the determination of activity of penicillin acylase is focus on hydrolytic activity of penicillin acylase. But there is lack of the reports on determination in activity of synthesis of amoxicillin, which leads to the fact that fast determination of the synthesis speed from penicillin acylase to amoxicillin may be impossible and the production cannot be guided from theory. In this article, the activity of amoxicillin synthesized from penicillin acylase was deifned and the method for measuring the activity was studied. It was shown that this method is easy to operate and the result is accurate and reliable. Moreover, by using this method the activities of penicillin acylases produced from different factories are easy to be compared so that the comparing results can be used as guidance for production.
Pharmaceutical Engineering Design