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Hydroguard-Treated MXT Guard/Retention Gap Columns/Transfer Lines (passivated stainless steel)

  • Extend analytical column lifetime by preventing degradation from harsh "steam-cleaning" water injections.
  • Maximum temperature: 325 °C.
Ordering Notes
Certificates of analysis for new 5 m and 10 m Restek guard columns are now provided electronically. To view and download your 5 m or 10 m guard column certificate, simply visit www.restek.com/documentation then enter your catalog # and serial #.

Hydroguard-Treated MXT Guard/Retention Gap Columns/Transfer Lines (passivated stainless steel)

Select Catalog # below
Catalog # 70081
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Catalog #
70081 5 m ea. 0.53 mm 0.74 ± 0.025 mm Select Deselect
Length
5 m  
Units
ea.  
ID
0.53 mm  
OD
0.74 ± 0.025 mm  
Product Name
Hydroguard MXT Guard Columns & Transfer Lines  
70084 10 m ea. 0.53 mm 0.74 ± 0.025 mm Select Deselect
Length
10 m  
Units
ea.  
ID
0.53 mm  
OD
0.74 ± 0.025 mm  
Product Name
Hydroguard MXT Guard Columns & Transfer Lines  
70087 30 m* ea. 0.53 mm 0.74 ± 0.025 mm Select Deselect
Length
30 m*  
Units
ea.  
ID
0.53 mm  
OD
0.74 ± 0.025 mm  
Product Name
Hydroguard MXT Guard Columns & Transfer Lines  

When transfer lines from purge-and-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—Hydroguard deactivated tubing. 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 surface beneath. Use Hydroguard tubing for connecting GCs to these devices:
  • Headspace analyzers.
  • Air analysis equipment and concentrator units.
  • Purge-and-trap systems.
*30-meter lengths are banded in 5-meter sections.
Diameters greater than 0.10 mm are tested with the Grob test mix to ensure high inertness.