Fused Silica Capillary

fused silica capillaryManufacturer of Rxi® as well as Rtx®, Stabilwax®, Rt®, and other renowned GC column brands, Restek draws our own fused silica tubing to ensure ample supply and utmost quality.

Metal (MXT®) Capillary

metal (mxt<sup>®</sup>) capillarySiltek®-treated stainless steel MXT® GC columns are ideal where small coil diameters are a must or the potential for breakage is elevated: high temperatures, field instruments, process GCs, small ovens, and more.

Packed & Micropacked

packed & micropackedRestek® packed and micropacked GC columns give you the inertness of glass and durability of steel. Get accurate, breakage-free results for a wide range of active compounds.

PLOT Columns

plot columnsAvailable in both fused silica and MXT® metal tubing, Restek’s next-generation PLOT GC columns offer minimized particle release, more consistent flow, and outstanding peak symmetry for improved analysis.


For over 30 years, Restek has designed and manufactured gas chromatography (GC) columns. From fused silica to metal MXT®, from PLOT to packed, we offer a wide variety of both general-purpose and application-specific GC columns to analysts around the world. Our research team develops proprietary stationary phases and optimized GC column chemistries to span the full polarity range, making it easy to select a perfectly matched GC column that helps you run faster and produce outstanding results. Our Innovations lab generates applications for environmental, food safety, petrochemical, chemical, forensic, bioanalytical, and other industries—you’ll find the chromatograms here on the Restek® website for your convenience—and the Restek® Quality Control department measures against strict specifications to ensure that our GC columns exceed your expectations, as well as your customers’.

As an independent, employee-owned company, Restek is free to supply GC columns for every instrument, regardless of who made it. And our gas chromatography experts have extensive experience to provide you with the information you need about Restek® GC columns, applications, troubleshooting, method development, and more. Best of all, each GC column that leaves our facility comes with an unbeatable guarantee: Restek® Pure Satisfaction.

Install the best GC columns into your instrument. Visit the product sections above to learn more about Restek’s GC analytical columns and guard columns, then put them to work in your lab and see firsthand why so many chemists trust their data to Restek® Pure Chromatography.