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separation of quaternary ammonium surfactnats
Posted: Thu Jan 05, 2006 8:46 pm
by surfactant
well i amm trying to separate a diquaternary surfactant from a monoquaternary surfactant by preparative gravity column chromatography. And iam trying mixtures ofacetonitrile and acetone with liquor ammonia with little success. Any ideas and suggestions please[/b]
Posted: Fri Jan 06, 2006 5:26 pm
by Mark Tracy
These stick firmly to silica gel at alkaline pH by ion exchange, and to residual silanols on reversed phase columns. Once, just to prove a point, I made a "reversed phase" column by coating silica gel with hexadecyl-trimethyl-ammonium. To elute the surfactants you will want to lower the pH to protonate the silica.
separation quaternary surfactants
Posted: Sat Jan 07, 2006 1:28 pm
by surfactant
thanks dear mark
i will try it out in the lab and come back
Posted: Sat Jan 07, 2006 3:02 pm
by james little
might find some useful info in
http://www.polysurfacesbookstore.com/pages/3153.html
Analysis of Surfactants, 2nd Ed by Thomas Schmidt
Posted: Sat Jan 07, 2006 7:43 pm
by surfactant
dear sailor
i did refer this books concerning analysis of surfactants but got nothing substantial out of it