GC for Organic solvent

[lauric]

Can someone teach me how to set the method to seperate the IPA and Ethanol by using HP-Innowax??

[dblux_]

Can someone teach me how to set the method to seperate the IPA and Ethanol by using HP-Innowax??

I doubt this column could sufficiently resolve IPA from ethanol (especially if one of them is solvent).

Would try DB-1.

[lauric]

I just joint at solvent distribution and repacking company one week, the GC is mainly use to test the mixed solvent that may content ACETONE, BUTYL ACETATE, BUTYL CELLOSOLVE, CELLOSOLVE ACETATE, ETHYL ACETATE, HEXANE, ISO-BUTANOL, IPA, MIBK, MEK, METHANOL, N-BUTANOL, TOLUENE, XYLENE, DEA, DEG, MPG, MEA, MEG, MPA, TEG, ETHOXY PROPANOL, AMYL ACETATE,DIMETHYL FORMAMIRY,CYCLOHEXANE.

I do not sure the HPInnowax is suffient to test this or not and currently i do not have DB-1.

Anyone here can tell me more specify what column should i use and what setting do i need to use.

[dblux_]

...I do not sure the HPInnowax is suffient to test this or not and currently i do not have DB-1.

Anyone here can tell me more specify what column should i use and what setting do i need to use.

Take 1st chromatography supplies catalog of your choice. There are always several existing aplications. Look for "industrial solvents" and start with most appriopriate application. Then you may modify it to better suit your needs.

[lauric]

...I do not sure the HPInnowax is suffient to test this or not and currently i do not have DB-1.

Anyone here can tell me more specify what column should i use and what setting do i need to use.

Take 1st chromatography supplies catalog of your choice. There are always several existing aplications. Look for "industrial solvents" and start with most appriopriate application. Then you may modify it to better suit your needs.

I have done this for one week, i cant find any column that consist of IPA and Ethanol at the same time. If there is no present either one of this solvent, the results shown all ok......

[dblux_]

http://content.yudu.com/Library/A1qs9z/ ... ces/69.htm

page 69

[lauric]

http://content.yudu.com/Library/A1qs9z/AgilentGCSelectionGu/resources/69.htm

page 69

Thanks
I will contact column supplier for more info

[dblux_]

Thanks

My pleasure.

I will contact column supplier for more info

You mean price and discounts ?

BTW - you will probably choose narrower column than 0.53 mm.

[Johnny Rod]

I was also going to suggest a DB-624, this phase handles most common solvents very well. I wouldn't use a DB-1 for solvents, the more polar stuff chromatographs badly.

[chromatographer1]

Johnny's comments are worth heeding.

IPA and Ethanol separate well on the 624 - 1301 phase column.

and of course, so do many other solvents.

If you expect to separate high % levels of both and the 1301 doesn't suffice, then there is always the porous polymer columns which work wonders.

best wishes,

Rod

[dblux_]

I was also going to suggest a DB-624, this phase handles most common solvents very well. I wouldn't use a DB-1 for solvents, the more polar stuff chromatographs badly.

In 1st post there were only IPA and EtOH to resolve and almost all of us have DB-1 column handy. That's why I suggested this phase as sufficient for intended use.

When the list of compounds grew to a number it was natural to suggest better suited phase.

Cheers

[chromatographer1]

yes, it is amazing how the question will evolve during the discussion so your adequate answer initially will suddenly be inadequate, and both the poster and you the responder will have wasted a lot of time and effort.

Please all who seek answers, give more information about your problem and try not to waste both yours and others time.

Rod