This method has been successfully used to determine benzoic acid and salicylic acid in commercial preservative and bactericide simultaneously.
将该方法用于商品杀菌防腐剂中苯甲酸及水杨酸的同时测定，结果满意。
2
The method for preparing the acid pectase preparation still can ensure slow growth of bacteria in the acid pectase preparation in the absence of preservative.