天气预报15天查询> 其他> 如何过柱子

如何过柱子

更新时间: 2020-10-13 00:00:00     

1、称量,200到300目硅胶,称30到70倍于上样量;

2、搅成匀浆,加入干硅胶体积一倍的溶剂用玻璃棒充分搅拌;

3、装柱,将柱底用棉花塞紧,加入约三分之一体积石油醚,装上蓄液球,打开柱下活塞,将匀浆一次倾入蓄液球内。随着沉降,用石油醚将沾在蓄液球内的硅胶冲入柱中;

4、压实,加入石油醚,用双联球或气泵加压,直至流速恒定;

5、上样,加入一些洗脱剂,将一团脱脂棉塞至接近硅胶表面;

6、过柱和收集,用梯度洗脱;

7、检测,使用专用喷显剂检测;

8、送谱,收集的产品旋干,在送谱前重结晶。

关键词: 如何 柱子

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-2956661/ | 耗时:0.0180 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=2956661 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2956661 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2956661 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1132577,108700,2397730,112858,110663,1340865,2606097,266303,1886577,2416623,113513,1071315,1096837,115214,3134805,1279385,2673893,1065675,1128957,1974377,1099827,1078615,115501,109029,113898,114167,1122956,1044569,1057710,2228395) ORDER BY field (ArticleID,1132577,108700,2397730,112858,110663,1340865,2606097,266303,1886577,2416623,113513,1071315,1096837,115214,3134805,1279385,2673893,1065675,1128957,1974377,1099827,1078615,115501,109029,113898,114167,1122956,1044569,1057710,2228395)