Abstract
Summary 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.
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