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GC COLUMNS |
CAPILLARY COLUMNS
Fused Si l ica Guard/Retent ion Gap Columns
Base-Deactivated Guard/Retention Gap Columns (fused silica)
• Tested with a basic amine test mix.
• Excellent inertness for basic compounds.
• Recommended for use with Rtx®-5 Amine, Rtx®-35 Amine, Rtx®-Volatile Amine,
and Stabilwax®-DB capillary columns.
• Batch test chromatogram included.
• Maximum temperature: 315 °C.
Chemists using guard columns in the analyses of basic compounds frequently observe
peak tailing and low recovery. This happens because conventionally deactivated tubing
surfaces can be adsorptive to basic compounds. Restek offers base-deactivated guard
columns, as well as base-deactivated inlet liners, for completely inert sample pathways.
*30- and 60-meter lengths are banded in 5-meter sections.
†Recommendation: Cut 60m guard columns into shorter lengths. Using full length may cause peak distortion.
did you
know
?
We test our guard columns/transfer lines
with a comprehensive test mix to ensure
high inertness.
Hydroguard®Water-Resistant Guard/Retention Gap Columns/Transfer
Lines (fused silica)
• Extend analytical column lifetime by preventing degradation from harsh
“steam-cleaning” water injections.
• Tested with a comprehensive test mix, to ensure high inertness.
• Maximum temperature: 325 °C.
When transfer lines from purge & trap systems, air monitoring equipment, or other
instruments carry condensed water vapor, deactivated column tubing quickly becomes
active because of the creation of free silanol groups. These silanol groups adsorb active
oxygenated compounds, such as alcohols and diols.
Restek chemists have addressed this concern and found a solution—the Hydroguard®
deactivation process. A unique deactivation chemistry creates a high-density surface
that is not readily attacked by aggressive hydrolysis. The high-density surface coverage
of the Hydroguard® deactivation layer effectively prevents water vapor from reaching
the fused silica surface beneath. Use Hydroguard® tubing for connecting GCs to:
• Headspace analyzers.
• Air analysis equipment and concentrator units.
also
available
Metal MXT® Guard Columns
Rugged, flexible, Siltek® treated stainless steel
tubing; inertness comparable to fused silica
tubing. See
page 114
.
Nominal ID Nominal OD
5-Meter
5-Meter/6-pk.
0.25mm 0.37 ± 0.04mm 10000
10000-600
0.32mm 0.45 ± 0.04mm 10001
10001-600
0.53mm 0.69 ± 0.05mm 10002
10002-600
also
available
Base-deactivated inlet liners
See page 213.
Nominal ID Nominal OD
5-Meter
5-Meter/6-pk.
10-Meter
30-Meter* 60-Meter*
†
0.05mm 0.363 ± 0.012mm 10075
0.10mm 0.363 ± 0.012mm 10076
0.15mm 0.363 ± 0.012mm 10077
0.18mm 0.37 ± 0.04mm 10078
0.25mm 0.37 ± 0.04mm 10079
10079-600
10082
10085
10088
0.32mm 0.45 ± 0.04mm 10080
10080-600
10083
10086
10089
0.53mm 0.69 ± 0.05mm 10081
10081-600
10084
10087
10090
Website :
E-mail :
TelNo : 03 9762 2034 . . . in AUSTRALIA
Mar 2011
2012
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