Validation and application of a method for polycyclic aromatic hydrocarbons (PAHS) analysis in marine sediments using APGC-MS/MS

Accurate assessment of polycyclic aromatic hydrocarbon (PAH) pollution in marine sediments requires the establishment and validation of standard analytical techniques. In this work, a previously reported rapid, simple, inexpensive, effective, robust and safe (QuEChERS) alternative method for the determination of 16 PAHs in soils was modified and improved for application to marine sediments. The method involves QuEChERS extraction followed by atmospheric pressure gas chromatography coupled to tandem mass spectrometry. Validation was carried out according to the EURACHEM Guide using certified reference sediment material, evaluating selectivity, specificity, limits of detection and quantification, linearity, accuracy and precision. A good linear relationship (correlation coefficients ≥ 0.99) was observed in the range of 0.4–2500 µg/kg. The limits of detection and quantification ranged from 0.1 to 0.6 µg/kg and from 0.4 to 2.0 µg/kg, respectively. In terms of accuracy and precision, the results obtained were within acceptable limits based on the certificate of the reference material used during validation. The method was also used to assess the levels of PAHs in marine sediment samples from the Peruvian coast. We found PAH concentrations ranging from below the detection limit of the method up to 130.5 µg/kg. The developed method showed overall satisfactory results, supporting its applicability to marine sediments and its potential extension to other types of samples.