Hydrogen Carrier Gas Method Translation in Comprehensive Two-Dimensional Gas Chromatography for Sustainable...

Area of Science:

• Analytical Chemistry
• Separation Science
• Green Chemistry

Background:

• Carrier gas selection critically impacts one-dimensional gas chromatography (1D GC) and comprehensive two-dimensional gas chromatography (GC×GC) performance.
• Helium, the conventional carrier gas, presents sustainability challenges due to cost, availability, and fossil fuel dependence.
• Hydrogen is a sustainable alternative, offering faster optimal linear velocities and greener production methods.

Purpose of the Study:

• To establish and evaluate methods for translating helium-based GC×GC methods to hydrogen carrier gas.
• To assess the performance of translated methods for cryogenically modulated GC×GC-MS.
• To validate the translated methods using forensic fingermark residue samples.

Main Methods:

• Translation of 1D GC methods to GC×GC using flow and temperature adjustments to match column efficiency.
• Evaluation of three translated methods with standard mixtures and assessment of modulation period.
• Validation using authentic fingermark residue samples in a forensic context.

Main Results:

• Translated methods achieved comparable peak capacity, signal-to-noise ratios, tailing factors, and resolution to helium-based methods.
• Modulation period was successfully reduced by 50%, enhancing practical applicability.
• Hydrogen carrier gas reduced overall run time by up to 60%, increasing sample throughput and lowering energy consumption.

Conclusions:

• Method translation from helium to hydrogen is feasible for cryogenically modulated GC×GC-MS, maintaining analytical performance.
• Hydrogen offers significant advantages in terms of speed, efficiency, and sustainability compared to helium.
• The findings provide practical guidelines for adopting hydrogen carrier gas in GC×GC, aligning with green chemistry principles.