Analysis of pesticide residues in seaweeds using matrix solid-phase dispersion and gas chromatography-mass spectrometry detection

► Seventeen pesticide residues and related compounds analysed from edible and wild seaweeds. ► Matrix solid-phase dispersion using 3.6 g of Florisil and 0.4 g of graphitized carbon black as clean-up adsorbents. ► Determination by gas chromatography-mass spectrometry with limits of detection (LOD) ranged from 0.5 to 2.9 ngg−1. ► Accuracy as recoveries ranged from 81.6% to 113.2% and precision as RSDs was lower than 15%.