【多选题】硝苯地平的鉴别方法有
D.
取待测品约25mg,加丙酮1ml溶解,加20%氢氧化钠溶液3~5滴,振摇,溶液显橙红色
E.
照紫外—可见分光光度法测定,在237nm的波长处有最大吸收,在320~355nm的波长处有较大的宽幅吸收
【多选题】硝苯地平的鉴别方法有
D.
取待测品约25mg,加丙酮1ml溶解,加20%氢氧化钠溶液3~5滴,振摇,溶液显橙红色
E.
照紫外一可见分光光度法测定,在237nm的波长处有最大吸收,在320~355nm的波长处有较大的宽幅吸收
【单选题】Woman: What's your plan for the winter holiday? Man: I'm going skiing in Colorado. Woman: But it's very dangerous for a beginner. Do your parents agree? Man: No, but I can get round them. Question: Ho...
A.
He will persuade his parents.
B.
He will lie to his parents.
C.
He will go without his parents' permission.
D.
He will go somewhere else before going skiing.
【单选题】— What's your plan for this winter vacation? — I'll take an express train to Dalian for my holiday ______ school ends. [ ]
【单选题】听力原文:W:What's your plan for the summer holiday? M:I'm going to Australia. Q:What's the woman going to do for the summer holiday? (7)
【判断题】二氢吡啶类药物的丙酮溶液与氢氧化钠试液反应显橙红色,ChP2015利用该反应鉴别硝苯地平、尼索地平等。()
【判断题】《中国药典》 (2015年版)中用于硝苯地平的鉴别反应是颜色反应。()