第11题: [单项选择]《中国药典》采用什么方法来控制硫酸阿托品中莨菪碱的限量() A. 折光率 B. 黏度 C. pH值 D. 旋光度 E. 相对密度 参考答案:D 答案解析:硫酸阿托品为消旋体,无旋光性。而莨菪碱为左旋体,有旋光性。莨菪碱是因阿托品消旋不完全引入,药典采用旋光度法来控制莨菪碱的限量。
第21题:[单选题]16.Which of the following statements with regard to international economics is true? A.A.It is a relatively new field B.B.it is a relatively old field C.C.most of its contributors were not economists D.D.none of the above1. 参考答案:B