Insecticide residue analyses in cucumbers sampled from Çanakkale open markets

Türkiye Entomoloji Dergisi-Turkish Journal Of Entomology, cilt.44, sa.4, ss.449-460, 2020 (SCI Expanded İndekslerine Giren Dergi)

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.