Insecticide residue analyses in cucumbers sampled from Çanakkale open markets


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ÇATAK H., TİRYAKİ O.

Türkiye Entomoloji Dergisi-Turkish Journal Of Entomology, vol.44, no.4, pp.449-460, 2020 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 44 Issue: 4
  • Publication Date: 2020
  • Doi Number: 10.16970/entoted.767482
  • Title of Journal : Türkiye Entomoloji Dergisi-Turkish Journal Of Entomology
  • Page Numbers: pp.449-460
  • Keywords: Cucumber, insecticide residues, QuEChERS, risk assessment, toxicology, PESTICIDE-RESIDUES, GREENHOUSE CUCUMBERS, QUECHERS, SOIL

Abstract

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.