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GC COLUMNS |
METAL MXT® CAPILLARY COLUMNS
MXT® Columns Overview
What is an MXT® column?
MXT® columns are wall coated open tubular (WCOT) columns made from stainless steel tubing that has had the internal surface
treated with an exclusive Siltek® treatment. This treatment makes the surface as inert as deactivated fused silica, and it allows us to
treat the tubing with a wide variety of polymer phases. The unique Siltek® treatment also enables us to offer MXT® columns in a wide
range of internal diameters, including 0.18 mm, 0.25 mm, 0.28 mm, 0.32 mm, and 0.53 mm. Because the Siltek® treatment perme-
ates the stainless steel surface, rather than simply coating it, the layer is exceptionally flexible, so the tubing can be coiled to very
small diameters. The standard coil diameter for most MXT® columns is 4.5", but they also are available in 3.5" and 6" coil diameters.
Whether you’re using them in a process GC or a benchtop GC, our MXT® columns will be a perfect fit.
Just add the proper suffix number in the table to the column part number when you order!
Coil
Suffix
Diameter Number Configuration
3.5"
-273
Bundled
4.5"
None
Standard
Banded
6.0"
-276
Bundled
Banded
Bundled
MXT® columns are your best choice for high temperature analyses and situations in which
the potential for column breakage is high. Here's why:
• Metal tubing allows MXT® comlumns to be used to higher temperatures (430 °C) than fused silica col-
umns (standard rating is 360 °C). This is because the polyimide resin that encases the fused silica becomes
brittle over time at high temperatures. MXT® columns do not become brittle or break.
• Inertness of MXT® columns and fused silica columns is similar, due to the unique properties of the Siltek®
surface treatment.
• Metal columns can be coiled under 4.5 inches without breaking, making them ideal for small instruments.
• Coating efficiency (plates/meter) of MXT® columns is similar to that of fused silica.
• MXT® columns will not break under stress, making them perfect for process GCs and field instruments.
CustomMXT® columns are also available.
If you do not see the column you need listed in the following pages, contact Customer Service and we will
be happy to help.
MXT®-Biodiesel TG columns are undamaged by high thermal cycles compared to high-
temperature (HT) fused silica columns, which break down under the same conditions.
100 temperature cycles to 430 °C totaling 500 minutes at maximum temperature.
MXT®-Biodiesel TG columns are
undamaged by high thermal cycles.
HT fused silica columns, labeled as stable to
430 °C, show pitting and breakdown.
MXT
ideal for
high-temperature
analyses
Additional sizes and configurations may be available; call for details.
Note that the minimum coil diameter for 0.53 mm ID columns is 2.5 inches, and the minimum coil diameter for 0.25 mm ID columns is 1.5 inches.