Restek GC Guard Column, Hydroguard Deactivation, 5 M, 0.25 mm ID

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.

Note: For guard columns, cutting the high-temperature string from the tubing will cause the tubing to unravel. Use caution.