2楼: Originally posted by cccdragon at 2013-07-20 20:46:02
谢谢，不过我没找到想要的答案。。。

3楼: Originally posted by suruiqin at 2013-07-20 21:38:04
二乙基二硫代氨基甲酸银法（Ag-DDC法）：本法的原理为砷化氢气体与二乙基二硫代氨基甲酸银的氯仿溶液在有机碱性试剂二二乙胺存在下，反应生成红色的胶体状态的金属银。
古蔡法检查砷盐的原理为：金属锌与酸作用产生 ...

5楼: Originally posted by cccdragon at 2013-07-22 20:34:38
对了，我还想问一个问题，就是其中的醋酸铅棉花起什么作用呢？...

6楼: Originally posted by suruiqin at 2013-07-22 21:34:30
吸收硫化氢
...

6楼: Originally posted by suruiqin at 2013-07-22 21:34:30
吸收硫化氢
...

7楼: Originally posted by cccdragon at 2013-07-23 20:24:19
是这样啊，谢谢...