作者EricHaze (慵懒)
看板Chemistry
标题[实验] 想请教索氏萃取法
时间Sun Sep 30 22:55:49 2007
我是机械所的学生 做燃烧方面的
我现在需要分析燃烧後产气的particle跟tar
我找到一篇文献有提到需要用到Soxhlet apparatus
但我怕我搞错他意思 想问大家对不对
我先节录一段好了:
The membrane filter with the (solid) filtration residue is extracted with
100 ml methylen chloride(CH2Cl2) in a Soxhlet apparatus at 40°C
for at least 8 hours. For the extraction, preferably Soxhlet tubes made of
glass fibres are used. From a defined fraction of the Soxhlet extract,
the methylen chloride is carefully evaporated at approx. 40°C.
The residual liquid is added to the organic phase mixture OPM.
The Soxhlet residue (Solid A) is a fraction of the total particulates.
在这之前的步骤是把有机溶液(有anisole、tar跟particle)过滤 会滤出particle
我看意思好像要用索氏萃取法从filter把particle取出是吗?
找到的原理是说易挥发溶剂在索氏提取器里不断地蒸发、冷凝、溶解被提取物、
纯溶剂再蒸发、冷凝、溶解被提取物,一直到把被提取物提取乾净
照文献看 我用的溶剂就是二氯化碳是吗?
但我以前化学没学好 没用过这方法
不知道有人能我一些资料介绍这方法的
或是告诉我哪里能找到详尽的教学呢?
谢谢~
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