Select for Permanent Gases-Dual Column

Select Permanent Gases Column

Application-Specific GC Columns

Agilent J&W Select Permanent Gases/CO2 columns are a dual-column configuration engineered to deliver accurate, efficient separation of permanent gases and carbon dioxide in a single GC run. This system pairs two highly complementary phases—CP-Molsieve 5Å for the resolution of permanent gases such as hydrogen, oxygen, nitrogen, methane, and carbon monoxide, and CP-PoraBOND Q for precise CO2 quantitation without adsorption or peak distortion.

Designed for fast, reliable separations, the optimized column dimensions support high-sensitivity analysis and low-level quantification, including challenging argon/oxygen splits that require tight peak shape control and repeatable retention behavior. Each column set is factory-coupled, fully conditioned, and performance-tested to ensure consistent results across laboratories and instruments.

This dual-phase platform enables the simultaneous analysis of permanent gases and CO2 without column switching, reducing run time, simplifying method development, and improving workflow efficiency in petrochemical, industrial gas, refinery, and specialty gas production environments. Its rugged construction and proven stability also deliver long column lifetime under continuous high-throughput operation.

With pre-aligned, pre-tested column sets and excellent inertness for reactive gases, Agilent Select Permanent Gases/CO2 columns provide dependable performance for critical purity testing, process monitoring, and regulatory compliance workflows.

Key Definitions â–¸
Permanent Gases
Inorganic gases such as hydrogen, oxygen, nitrogen, methane, and carbon monoxide that remain in the gaseous state under standard temperature and pressure. These gases require specialized stationary phases like Molsieve 5Ã… for accurate separation and quantification.
Molsieve 5Ã…
A porous molecular sieve stationary phase composed of crystalline aluminosilicate with uniform 5 Å pores. Used for separating small permanent gases by molecular size and polarity, offering exceptionally high resolution for O2/Ar splits and CO–N2 separations.
PoraBOND Q
A highly inert porous polymer phase designed for the analysis of CO2, C1–C3 hydrocarbons, and light VOCs. Its non-adsorptive surface prevents CO2 tailing, making it ideal for purity testing and quantitative CO2 measurements.
Parallel Column Configuration
A GC setup in which two different stationary phases are operated simultaneously to analyze complex gas mixtures in a single run. This enables separation of permanent gases on Molsieve 5Ã… while CO2 elutes on PoraBOND Q, improving speed and accuracy.
Argon/Oxygen Separation
A challenging GC separation due to the similar molecular characteristics of oxygen and argon. Molsieve 5Ã… delivers the efficiency and retention control required for reliable quantitation of these gases in specialty gas and petrochemical applications.
Frequently Asked Questions â–¸
What applications are Select Permanent Gases/CO2 columns best suited for?
These columns are optimized for purity testing and compositional analysis of permanent gases and carbon dioxide in industrial gas production, petrochemical processing, refinery streams, and specialty gas applications requiring high-resolution separations.
Why use a dual-column configuration instead of a single GC column?
Permanent gases and CO2 require different selectivities for accurate separation. Molsieve 5Å provides the efficiency needed for H2, O2, N2, CO, and CH4, while PoraBOND Q delivers stable, non-adsorptive retention of CO2. Running them in parallel enables full analysis in a single injection—without column switching.
How does this column set prevent CO2 tailing?
The PoraBOND Q phase is engineered with exceptionally inert surface chemistry that minimizes adsorption of CO2, eliminating the tailing often observed on non-optimized PLOT phases. This ensures sharp peak shapes and reliable quantitation.
Can these columns separate oxygen and argon?
Yes. Molsieve 5Å provides the high efficiency and strong molecular sieving necessary to resolve oxygen and argon—an essential requirement for many industrial gas and petrochemical analyses.
Are Select Permanent Gases/CO2 column sets designed for fast GC analysis?
Yes. The optimized column dimensions and parallel configuration support rapid analysis of permanent gases and CO2 with excellent sensitivity and repeatability, even in high-throughput environments.
Why purchase these columns from Chrom Tech?
Chrom Tech is an authorized distributor of Agilent GC columns and provides expert support, fast shipping, and competitive pricing. Our team regularly assists laboratories running permanent gas and CO2 analyses, ensuring you receive the right configuration and dependable application guidance.