Pesticide residues in crops produced in north-western Poland

摘要

In 2011, 262 crop samples, originating from farms located in five voivodeships of north-western Poland, were tested for the presence of pesticide residues. Studies were conducting in framework of official control and included 23 products and 230 compounds. Several multi-residue methods based on gas chromatography and high performance liquid chromatography (GC-ECD/NPD, GC-MS/MS, HPLC-UV/PDA, LC-MS/MS) and one single-residue method based on spectrophotometric analysis were used for determination of pesticide residues. Totally, 26 compounds were detected in 29.0% of analysed samples. Exceedances of maximum residue levels (MRLs) were found in 0.4% of analysed samples, while the use of unapproved plant protection products in 4.2% of the samples. Pesticide residues were found mostly in samples of apples (84.6%), carrots (56.0%) and potatoes (50.0%). The frequency of their occurrence in the samples taken from individual voivodeships has differed from the average for the entire study area and ranged from 15.9-39.6%, and was the highest in food products from Kujawsko-pomorskie Voivodeship, while the lowest from Wielkopolskie Voivodeship.