Page 1 of 1
Wool
Posted: Tue Nov 08, 2005 5:11 pm
by WK
Hi all,
What is the "best" brand wool for general applications in liners you have found?
Why do you use this particular wool?
(A general enquiry).
I analyse for hydrocarbons,alcohols,esters,aldehydes.
WK
Posted: Wed Nov 09, 2005 7:30 pm
by Rick
I always use the same silanized glass wool and i never have any problem with
...this is an old glass wool from Analabs inc from Connecticut.....is company make this glass wool again...i don't know
No HGC-166
Posted: Tue Nov 15, 2005 3:45 pm
by WK
Thanks Rick,
I have recently removed wool from my GC-MS liner and the background is obviously much better (spectra and file size).
I have tried filling the liner with deactivated fused silica and also deactivated borosilicate wool.
The result is that my peak shapes are better (than with no wool) but sensitivity and baseline is poorer.
Can I get good peak shapes,sensitivity and baseline in one package?
Anyone tried glass beads?
Anyone tried carbofrits?
WK
Posted: Tue Nov 15, 2005 4:50 pm
by Rick
Put a small piece of wood in your liner...7mm, not a big because you will have backflash... liner capacity is less with wool...put your piece of wool in the center of your liner and manipulate wool with tool, not with glove.
Don't forget..., differents product can be trap by wool...
I use glass wool for pesticide analysis,sterols,FAME and sugar in food.
Good luck!
Sorry for my english...my chromatography is better...ha!ha!
Posted: Sun Nov 27, 2005 5:47 am
by wsayers
You may want to try quartz wool instead of glass. It is more inert, with less metal active sites on the surface and so on.
To avoid problems related to inadequate thermal mass, I always pack the bottom of the liner (the part below maximum needle depth) with quartz wool. A straight through liner with the bottom packed works well in both split and splitless modes.
You can experiment with how much packing you need, but you are going to need some packing in most situations.