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wsht212(½ð±Ò+1):лл½»Á÷£¬Ï£Íû³£À´£¡ 2010-08-25 20:03:52
first put it into a solvent that can dissolve your compound very well.
Then slowly add a poor solvent into this solution. Put the mixture
several days. Due the the decrease of solubility, the compound may
crystallize.
2Â¥2010-08-25 00:51:52
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