Chromatography Forum

Chromatography Forum is a public discussion group where you can post questions, news, or messages of interest to chromatographers everywhere, but you must be registered to participate (registration is FREE). If you are a registered user, please log in.
http://www.chromforum.org/

Column Performance

http://www.chromforum.org/viewtopic.php?t=9934

Page 1 of 1

Column Performance

Posted: Thu Jan 22, 2009 2:44 am
by addy
Hi !
I want to know why do we perform k'Formic Acid/k'Acetic Acid & k'Triphenylene/k'O-Terphenyl to check column performance? how it is related to column chemistry?

:P

Posted: Thu Jan 22, 2009 2:23 pm
by Bryan Evans
k'a / k'b = alpha

alpha for Triphenylene / O-Terphenyl is used to evaluate shape selectivity
for reversed phase columns. The link below has more information on this subject:
http://www.imtakt.com/TecInfo/TI252E.pdf

Acetic acid / formic acid are not well retained under RP conditions.

Maybe acetic acid / formic acid has been used to evaluate "aqueous" type ODS phases
or anion exchange columns. I'm not sure.

Posted: Fri Jan 23, 2009 3:41 am
by addy
Thanks for reply! Bryan Evans

I found my anwser.Link is also usefull.Thanks again
:P
All times are UTC
Page 1 of 1
Powered by phpBB® Forum Software © phpBB Limited
https://www.phpbb.com/