Validation of the multiresidual GC-MS method for determining plant protection product residues in strawberries

Helena BAŠA ČESNIK

doi:10.14720/aas.2018.111.2.13

Authors

Helena BAŠA ČESNIK Agricultural Institute of Slovenia,Hacquetova ulica 17, SI-1000 Ljubljana, Slovenia

DOI:

https://doi.org/10.14720/aas.2018.111.2.13

Keywords:

pesticide residues, GC-MS, strawberries, plant protection product residues, multiresidual method

Abstract

Gas chromatography coupled with mass spectrometry was used for the introduction and validation of the multiresidual method for determining of plant protection product residues in strawberries. During the validation procedure, limits of quantification were set and the method was checked for its recovery, linearity, repeatability, reproducibility and measurement uncertainty. An interlaboratory comparison was also performed to check the accuracy of the method. The method was proven to be fit for purpose. Afterwards 19 strawberry samples were analysed for the presence of plant protection product residues using the validated method. In the strawberries 5 active substances, all fungicides, were found: chlorothalonil, cyprodinil, fludioxonil, metalaxyl+metalaxyl-M and pyrimethanil. Residues of these active substances were in range 0.01 – 0.44 mg/kg. No cases exceeding the maximum residue levels were measured.

Author Biography

Helena BAŠA ČESNIK, Agricultural Institute of Slovenia,Hacquetova ulica 17, SI-1000 Ljubljana, Slovenia

Central laboratories

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