New GC Column Separates Critical PAHs

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Restek has developed a GC column specifically for the analysis of polycyclic aromatic hydrocarbons (PAHs) in food safety and environmental samples. The new Rxi®-PAH column features a higher phenyl-content stationary phase that provides a unique selectivity to separate important PAHs that cannot be distinguished by mass spectrometry. Even difficult priority compounds, such as the European Food Safety Authority (EFSA) PAH4, are easily separated and accurately quantified, results that cannot be achieved on typical GC columns. The selectivity and efficiency of the Rxi®-PAH column make it ideal for EFSA PAH4 analysis; chrysene triphenylene separation and resolution of all benzofluoranthenes are easily achieved. Excellent column efficiency means critical PAH separations can be maintained when the column is trimmed. In addition, the rugged, arylene-modified stationary phase is stable up to 360 °C, which ensures that relatively nonvolatile, higher molecular weight PAHs, such as dibenzo pyrenes, can be analyzed routinely without interference from column bleed. Separation of benz[a]anthracene, chrysene, benzo[b]fluoranthene, benzo[a]pyrene, and other PAH compounds make Rxi®-PAH columns ideal for EFSA PAH4 analysis, as well as other environmental and food safety testing.