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guoyayun40

铁杆木虫 (正式写手)

[交流] 【求助】浊点萃取的作用 已有5人参与

各位做浊点萃取的朋友们,浊点萃取的优点是什么呀
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guoyayun40

铁杆木虫 (正式写手)

朋友们给给力啊
2楼2010-12-12 08:37:42
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yccxz809

银虫 (正式写手)


小木虫(金币+0.5):给个红包,谢谢回帖交流
浊点萃取
优点是不用有机溶剂,减少环境污染
yccxz809
3楼2010-12-12 19:00:18
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guoyayun40

铁杆木虫 (正式写手)

引用回帖:
Originally posted by yccxz809 at 2010-12-12 19:00:18:
浊点萃取
优点是不用有机溶剂,减少环境污染

萃取的作用重在浓缩,还是提纯呀,谢谢谢谢谢
4楼2010-12-13 09:30:54
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yccxz809

银虫 (正式写手)


chiraler(金币+1):谢谢交流 2010-12-14 00:32:11
富集和提纯同时进行
yccxz809
5楼2010-12-13 10:34:36
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platto

木虫 (著名写手)

一窍不通

★ ★
小木虫(金币+0.5):给个红包,谢谢回帖交流
chiraler(金币+1):谢谢交流 2010-12-14 00:32:19
简便、快速、环保、小型化
七窍通了六窍
6楼2010-12-13 11:39:31
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guoyayun40

铁杆木虫 (正式写手)

引用回帖:
Originally posted by yccxz809 at 2010-12-13 10:34:36:
富集和提纯同时进行

哪一个更重要一些呀?
7楼2010-12-13 21:36:50
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yccxz809

银虫 (正式写手)


小木虫(金币+0.5):给个红包,谢谢回帖交流
引用回帖:
Originally posted by guoyayun40 at 2010-12-13 21:36:50:

哪一个更重要一些呀?

The use of
micellar systems such as CPE for separation and preconcentration
has attracted considerable attention in the last few years mainly
because it is in agreement with the “green chemistry” principles.
Green chemistry can be defined as those procedures for decreasing
or eliminating the use or generation of toxic substances for human
health and for the environment [12]. CPE is a green method for the
following reasons: (a) it uses as an extractor media diluted solutions
of the surfactants that are inexpensive, resulting in the economy of
reagents and generation of few laboratory residues; and (b) surfactants
are not toxic, not volatile, and not easily flammable, unlike
organic solvents used in liquid–liquid extraction [13,14].
CPE consist of three simple steps: (1) solubilization of the analytes
in the micellar aggregates; (2) clouding; (3) phase separation
for analysis. When a surfactant solution is heated over a critical
temperature, the solution easily separates into two distinct phases:
one contains a surfactant at a concentration below, or equal to, a
critical micelle concentration; the other is a surfactant-rich phase.
The hydrophobic compounds initially present in the solution and
bound to the micelles are extracted to the surfactant-rich phase.
This phenomenon is observed, in particular, for polyoxyethylene
surfactants and can be attributed to the two ethylene oxide segments
in the micelle that repel each other at low temperature when
they are hydrated and attract each other when the temperature
increases owing to the dehydration.
yccxz809
8楼2010-12-14 12:22:14
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xiaomitaomm

金虫 (小有名气)


小木虫(金币+0.5):给个红包,谢谢回帖
我觉得富集倍数高 萃取率好 是最重要的,因为对于一些特殊基体,有机溶剂还是会少量用到
走在前面
9楼2011-06-11 11:11:44
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樱藤奈梨

新虫 (初入文坛)


小木虫: 金币+0.5, 给个红包,谢谢回帖
引用回帖:
9楼: Originally posted by xiaomitaomm at 2011-06-11 11:11:44
我觉得富集倍数高 萃取率好 是最重要的,因为对于一些特殊基体,有机溶剂还是会少量用到

浊点萃取的萃取效率怎么计算啊 谢谢
10楼2017-09-20 10:22:11
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