24小时热门版块排行榜    

查看: 333  |  回复: 0

littlechain

木虫 (正式写手)

[求助] 有关前药释放速率测试的问题

合成了一个药物的前药,想测试一下这个前药在血浆中的释放速率,查了很多文献。基本操作如下:
Prodrugs were dissolved in phosphate-buffered saline (0.01 M) at pH 7.4 or human plasma (400 μL per mL of PBS 7.4, 0.01 M) at an equivalent drug concentration of 1 g/L. The solutions were incubated at 37 ℃ with gentle shaking. At selected time intervals(0 h, 12 h, 24 h, 48 h, 72 h), aliquots (500 μL) were removed and an equivalent PBS concentration was added to the solutions. The aliquots were extracted by chloroform, and the organic fraction was evaporated. At the same time, the residue was mixed with acetonitrile (1000 μL) and analyzed by HPLC.
这里有一点不明白的是:每次取样500 μL后都要再加入500 μL PBS到原反应液中,这样的话不是每次测量时的条件都不一样了么?请问这样做的依据是什么?
专业不同,隔行如隔山啊,谢谢各位了
回复此楼
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

智能机器人

Robot (super robot)

我们都爱小木虫

相关版块跳转 我要订阅楼主 littlechain 的主题更新
信息提示
请填处理意见