Development of solid-phase microextraction to study dissolved organic matter-Polycyclic aromatic hydrocarbon interactions in aquatic environment

- Deuterated naphthalene used as internal standard provides better quantification of freely dissolved PAHs than regular external calibration.
- KDOC values of 18 PAHs were calculated thanks to SPME-GC-MS.
- Competition between PAHs, deuterated PAHs and DOM was demonstrated, pointing out the non-linearity of PAH-DOM interactions.
- Interactions of light molecular weight PAHs are stronger (higher KDOC values) in absence of high molecular weight PAHs.