Rxi Columns

Restek’s Extremely Inert (Rxi) high performance column family of fused silica capillary columns are very low bleed and exhibit exceptional inertness for active compounds, both basic and acidic. These columns were engineered for low-level analysis using new deactivation techniques and polymer cross-bonding technologies.

Next Generation - Exceptionally Inert Capillary Columns

• Unsurpassed inertness for low level basic and acidic compounds
• Ultra-low bleed
• Assured column-to-column reproducibility

Restek developed Rxi columns with robustness in mind. Restek's rugged polymers are cross-bonded and anchored to an extremely inert deactivation surface, resulting in a column that can take whatever abuse you throw at it. This rugged, inert design increases column lifetime and helps to reduce column maintenance, column replacement, instrument recalibration, and the potential need for method revalidation compared to other columns.

Rxi columns are manufactured for low column bleed—even at high GC oven temperatures—to shorten post-installation conditioning time and get your instrument up and running faster. All of these characteristics help minimize the need for maintenance, reduce your downtime, and raise the productivity of your instrument.

When your column lasts as long as an Rxi column, you will save on costs by purchasing fewer of them. And the column efficiency and inertness allow for faster analyses with lower detection limits. Produce better-quality data, spend less, and run more samples with Rxi columns.

Ultra-low bleed

Rxi-5ms columns have the lowest bleed among all major brands of columns.

Comparison of 30m x 0.25mm ID, 0.25µm columns. Bleed was compared at 330°C; hydrogen carrier gas; flame Ionization detection

Unsurpassed inertness

An Rxi-5ms columns provide the most symmetric peak for pyridine, a basic compound.

Among columns from 7 manufactures, the Rxi-5ms columns produces the most symmetric peak for pyridine. Each overlay is 2ng of pyridine on-column, at 50°C, on a 30m x 0.25mm ID 0.25µm column.

Guaranteed reproducibility

Rxi Column technology assures reliable column-to-column performance.

The examples shown here are for 30m x 0.25mm ID, 0.25µm Rxi-5ms columns from three manufactured batches. We perform this isothermal test on ecery cilumns, to verify that our tight quality control specifications are met.

Every Rxi column is held to stringent performance specifications for coating efficiency, selectivity, film thickness, inertness, and bleed. The Rxi column combination of inertness, ultra-low bleed, and column-to-column reproducibility guarantees you columns that will have the longest lifetimes of any columns on the market!

More information regarding Rxi GC columns:
Rxi GC Columns – 3-in-1 Technology

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