The aim of this study was to investigate four insecticide residues in cucumbers with the aid of QuEChERS
2007.1 method. For method verification assessment, pesticide-free cucumber matrix was spiked with 0.1, 1 and 10
times of MRL for each pesticide. The QuEChERS-LC-MS/MS analytical method revealed that the detection limits of
the insecticides were below the MRLs and the overall recovery of method was 97.7%. These figures were within the
SANTE recovery limits (60-140%) and the values specified for the repeatability (≤20%). Cucumbers were collected
from six different stands (A-F) at Çanakkale open markets for 6 weeks between 23 November and 28 December 2018.
Residues of each sampling time and each stand were assessed. Acetamiprid residue of 257g and 236 μg/kg were
detected in week 5 from stand B and in week 2 from stand E, respectively. These values are close to MRL (300 μg/kg).
Formetanate hydrochloride residue of the week 3 from stand F (36.3 μg/kg) was more than MRL of 10 μg/kg. Pirimiphos
methyl and chlorpyrifos residues were not detected in cucumbers. Theoretical maximum daily intake assessment
showed that there was no chronic exposure risk for these four pesticides through cucumber consumption.