Monitoring pesticide residues in greenhouse tomato by combining acetonitrile-based extraction with dispersive liquid-liquid microextraction followed by gas-chromatography-mass spectrometry

► Multiclass and multiresidue analyses of pesticide residues in greenhouses tomato. ► DLLME was performed using acetonitrile QuEChERS extracts as dispersive solvent. ► Validated method enables analyzes of a large number of samples within a working day. ► Cyprodinil was quantified in a tomato sample. ► Azoxystrobin, fenhexanid, tolyfluanid, λ-cyhalothrin and trifloxystrobin were detected.