A straightforward method for the analysis of PAHs in water by high-capacity sorptive extraction and TD–GC–MS
Application Note 291
A straightforward method for ppt-level PAH analysis in water
Polycyclic aromatic hydrocarbons (PAHs) are toxic, persistent pollutants found in both environmental and drinking water, with strict global regulations limiting their concentrations. Meeting these limits requires highly sensitive and efficient analytical techniques that can process large sample volumes with minimal manual handling.
This application note describes a fully automated, solvent-free method for quantifying 18 PAHs in water at low-ppt levels using HiSorb™ high-capacity sorptive extraction probes with Centri 90 preconcentration and TD–GC–MS. The method delivers:
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Exceptional sensitivity – limits of quantitation below 6 ng/L for all target PAHs, including 2.66 ng/L for the carcinogenic benzo[a]pyrene.
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High throughput – parallel sample extraction minimises GC downtime between samples.
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Hydrogen carrier compatibility – save on operational costs and reduce GC run times by ~35% without loss of separation.
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Robust performance – excellent reproducibility (RSDs <10%) and no significant carryover, even for low-volatility PAHs.
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Broad applicability – proven with both drinking water and environmental samples, and adaptable to other aqueous matrices such as beverages.
With minimal sample preparation and no solvent waste, this approach combines environmental responsibility with analytical efficiency – making it ideal for routine monitoring and compliance testing.
