Rxi-1ms

Rxi-1ms column

Restek Rxi-1ms GC Columns

Restek Rxi-1ms GC columns are high-performance, low-bleed columns designed to deliver exceptional stability, reproducibility, and inertness for a wide range of GC and GC-MS applications. Featuring a nonpolar 100% dimethylpolysiloxane stationary phase, Rxi-1ms columns provide predictable retention, excellent peak symmetry, and robust performance from routine QA/QC analyses to high-sensitivity mass-spectrometric workflows.

The advanced Rxi® deactivation process minimizes active sites on the column interior, resulting in outstanding peak shapes for both volatile and semi-volatile organic compounds. Analysts benefit from the extremely low bleed characteristics of Rxi-1ms columns, which provide cleaner backgrounds and improved limits of detection in GC-MS applications, even under demanding high-temperature programs.

As an authorized distributor of Restek products, Chrom Tech offers Rxi-1ms columns in a full range of dimensions to suit environmental testing, petrochemical analysis, flavor and fragrance profiling, pharmaceutical impurity assessment, industrial solvent screening, and general-purpose GC workflows. Their rugged construction and consistent lot-to-lot reproducibility make Rxi-1ms a trusted choice for laboratories requiring reliable, long-term chromatographic performance.

From high-throughput routine testing to trace-level GC-MS work, Rxi-1ms GC columns offer an ideal combination of inertness, stability, and predictable nonpolar selectivity—making them one of the most versatile and widely used columns in the Rxi® portfolio.
Key Definitions ▸
100% Dimethylpolysiloxane Phase
A fully nonpolar stationary phase widely used for general-purpose GC separations. It provides highly predictable retention order based primarily on boiling point, making it suitable for a broad range of VOCs, SVOCs, hydrocarbons, and industrial organics.
Rxi® Deactivation
Restek’s proprietary deactivation process that eliminates active sites inside the column, improving peak shapes and analyte recovery for active, polar, or thermally sensitive compounds.
Low Bleed
The minimized release of stationary-phase material during temperature programming. Low bleed is essential for GC-MS sensitivity, reducing background noise and improving spectral clarity.
GC-MS Compatibility
The ability of a GC column to withstand MS detector conditions with minimal bleed and chemical interference. Rxi-1ms columns are optimized for high sensitivity and clean mass-spectral baselines.
General-Purpose GC Column
A versatile GC phase suitable for a broad range of applications including environmental VOCs and SVOCs, petrochemical analyses, fragrance and flavor components, pharmaceutical impurities, and industrial solvents—making Rxi-1ms a universal workhorse column.
Frequently Asked Questions ▸
What types of analyses are best suited for the Rxi-1ms column?
Rxi-1ms is ideal for general-purpose GC and GC-MS applications including VOCs, SVOCs, industrial solvents, petrochemical components, fragrance and flavor compounds, and pharmaceutical impurities.
How does Rxi-1ms differ from other nonpolar GC columns?
While maintaining the standard selectivity of a 100% dimethylpolysiloxane phase, Rxi-1ms provides superior inertness and dramatically lower bleed, resulting in more stable retention times and cleaner mass spectra, especially for trace-level GC-MS work.
Is Rxi-1ms suitable for high-temperature GC applications?
Yes. Rxi-1ms columns offer robust thermal stability, enabling high-temperature programming while maintaining low bleed and consistent performance over long-term use.
Are Rxi-1ms columns compatible with GC-MS systems?
Absolutely. Their ultra-low bleed characteristics make Rxi-1ms columns highly compatible with GC-MS, enabling lower detection limits and improved mass-spectral fidelity.