Rapid analysis of polycyclic aromatic hydrocarbons.

Area of Science:

• Environmental Chemistry
• Analytical Chemistry
• Chromatography

Background:

• Polycyclic aromatic hydrocarbons (PAHs) pose significant environmental and health risks.
• Traditional reversed-phase liquid chromatography (LC) methods for PAH analysis are time-consuming, often taking tens of minutes.
• Increasing analytical throughput is crucial for effective environmental monitoring.

Purpose of the Study:

• To investigate the potential of sub-2 μm fully porous and superficially porous materials for reducing PAH analysis times.
• To compare the chromatographic selectivity and efficiency of different particle types and sizes.
• To demonstrate rapid, high-resolution separation of PAHs.

Main Methods:

• Utilized sub-2 μm fully porous (1.8 μm) and superficially porous (2.7 μm) chromatographic materials.
• Employed in silico modeling to develop separation methods based on backpressure requirements.
• Optimized flow rates for each column type to maximize throughput while maintaining resolution.

Main Results:

• Demonstrated similar chromatographic selectivity between the 1.8 μm fully porous and 2.7 μm superficially porous materials.
• Achieved sub-minute separation of a 16-component PAH mixture.
• Showcased significantly increased throughput with superficially porous materials due to lower backpressure at elevated flow rates.

Conclusions:

• Sub-2 μm superficially porous materials offer a viable alternative for rapid and efficient PAH analysis.
• The developed methods enable high-resolution separations in under a minute, drastically improving analytical throughput.
• This advancement facilitates more timely and comprehensive environmental and health risk assessments related to PAHs.