Hi Tom,

The quartz wool you mention has not given me any problems.  Actually I
prefer it over the course variety because it seems to hold together
better, getting less loose fibers all over you and the tubes.

Maybe you need to compact it a little more and have the full 4cm on the
bottom?

Regards,

Ben Harlow

-----Original Message-----
From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On
Behalf Of Thomas L. Millican
Sent: Wednesday, October 10, 2007 1:13 PM
To: [log in to unmask]
Subject: [ISOGEOCHEM] quartz wool for EA columns

It seems the consistency of the quartz wool we'd been using (Costech
021036) has changed. It is much too similar to cotton balls where it
used to be coarse. The light, fluffy product we now have simply doesnt
stay in place in the quartz columns. The result of this is the chemicals
just fall out through the bottom while installing the column or the top
plug of quartz wool will occassionally creep upwards in the column such
that the samples don't fall to where they should.
Does anyone have any recommendations for a supplier of a coarse quartz
wool?
Thank you,
-Tom Millican