Dear Listers,
We're encountering a problem with our gasbench measuring needle. It's
clogging every 2 days or so with usually single but sometimes multiple
pieces of septa. We run carbonates (acidified by hand), primarily, as
well as waters. When the needle isn't clogged we get exceptional
precision using carefully weighed sample sizes. Are we tightening the
exetainer caps too tight? Not tightly enough? I have tried different
needle tip shapes. The exetainer/cap/septa product code is 9RK8W 12mL
BORO x 100 from Labco, and the needle is the OEM thermo measuring
needle.
Thanks!
Chris
_____________________________
Chris Maupin
Paleoclimate Lab, JGB 5.118
Jackson School of Geosciences
University of Texas at Austin
1 University Station C1100
Austin, TX 78712
[log in to unmask]
Stable Isotope Lab: 512-232-4184
http://www.ig.utexas.edu/people/students/maupin/
|