Restek Releases the First Standard to Contain all Major PAH Interferences
13 Jul 2015
Product news
The new polycyclic aromatic hydrocarbon (PAH) interferences standard from Restek is the first and only certified reference material formulated to contain all major PAH interferences for priority PAHs.
Analysts can use this mixture to quickly confirm the presence of common interferences by retention time comparisons. Since the PAH components are present in different concentrations, isomers can easily be distinguished by the difference in their response factors.
Several key PAHs of health concern–such as chrysene and benzo[b]fluoranthene–coelute with other PAHs on most GC columns, which biases results. To ensure accurate reporting, this standard can be paired with an Rxi®-PAH column and Restek’s EU 15+1 PAH standard to optimize method conditions and ensure separation of interferences and target PAHs.
As this new PAH interferences standard meets strict ISO quality requirements, it is also suitable for quantitative work as a calibration or fortification standard.
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Rxi®-PAH Columns
Restek Corp.The Rxi®-PAH GC columns were designed by Restek with a higher phenyl-content stationary phase that provides unique selectivity to separate important polycyclic aromatic hydrocarbons (PAH) for food safety 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.Arylene modification and surface bonding of the stationary phase increase thermal stability and ruggedness so relatively nonvolatile, higher molecular weight PAHs can be analyzed routinely without interference from column bleed.Excellent column efficiency means that the column can be trimmed for maintenance purposes many times without losing critical PAH separations, including those that are part of environmental methods, as well as food safety testing. 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.Features: Ideal for EFSA PAH4 analysis—separates all priority compounds: benz[a]anthracene, chrysene, benzo[b]fluoranthene, and benzo[a]pyrene. Best resolution of chrysene from interfering PAHs, triphenylene, and cyclopenta[cd]pyrene. Complete separation of benzo [b], [k], [ j], and [a] fluoranthenes. 360 °C thermal stability allows analysis of low volatility dibenzo pyrenes.