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Studies on the decay of folpet, triadimenol and tetraconazole residues in apple fruits after their application against diseases were carried out. The studies were carried out in apple orchard situated in Budziwój the district of Rzeszów. According to test 1 the level of detected residues of folpet, triadimenol and tetraconazole directly after the treatments were respectively: 1.22±0.608; 0.065±0.22 and 0.067±0.023 mg/kg. The results of test 2 revealed that the folpet and triadimenol residues amounted to 1.671±0.430 and 0.082±0.012 mg/kg. In test 3 the detected level of tetraconazole was 0.034±0.007 mg/kg. On the basic of obtained results concerning the period of fungicide residue decay, it can be stated that fungicides containing folpet, triadimenol and tetraconazole used in apple orchards to protect apple fruits (intended for baby food production) against fungal diseases should be applied not later than 2 months before harvest.
In 2010 161 samples of plant origin were analysed. All the samples were intended for export to the Russian Federation. Total issued 111 safety certificates for fruit and vegetables exported to the Russian Federation. Violations of Russian MRLs were detected in 37 of analysed samples and violations of nitrates were detected in 12 samples. In 5 samples of apple boscalid was detected, which was not recommended for control of that kind of crop. In 3 samples of apple the usage of not approved pesticide were stated: diazinon, tolylfluanid and fenitrothion.
In 2011 samples of crops from south-eastern Poland were analysed. Pesticide residues were detected in 102 from 213 analysed samples. Among fungicide, residues mostly detected were: captan (22% samples), boscalid (12%), cyprodinil (5%) and difenoconazole (5%). Insecticide residues detected were: chlorpyrifos (8%), cypermethrin (4%) and pirimicarb (4%). Exceeding of MRLs were found in 4.2% of analysed samples.
The aim of study was to check the usefulness of the QuEChERS (Quick Easy Cheap Effective Rugged and Safe) method coupled with gas chromatography with electron capture detection and thermionic detection in analysis of pesticide residues in honey samples. 19 insecticides belonging to different chemical groups: organochlorine, organophosphates and pyrethroids were selected for the analysis. For 17 active substances satisfactory recovery, according to SANCO (DG SANCO – Directorate General for Health and Consumers) were received. For 2 substances: aldrin and HCB recovery did not fulfill the criteria of SANCO. The relative standard deviation (RSD), for all analyzed active substances were equal or lower than 20%.
The aim of this study was to evaluate the usefulness of the QuEChERS (quick, easy, cheap, effective, rugged and safe) sample preparation technique in conjunction with gas chromatography with electron capture and nitrogen phosphorus detection (GC‐ECD/NPD – gas chromatography with electron capture and nitrogen phosphorus detection) for the analysis of pesticide residues in peppermint. Validation experiments were carried out for 14 compounds at two spiking levels of 0.01 and 0.1 mg/kg. The obtained results were highly satisfactory and compliant with the criteria recommended by the European Union document SANCO/10684/2009 (recently superseded by SANCO/12684/2011). The compounds showed recoveries in the range of 70–120% and repeatability (relative standard deviation) equal to or less then 20%. The QuEChERS allowed to obtain high quality pesticide residue results with a reduced number of analytical steps and a lower glassware and solvent consumption compared with used previously method.
The aim of the studies was determination of dithiocarbamate residue decay in apple fruits of Champion variety and determination of possibility of application of fungicide from that group in protection of fruits destined for baby food production. The studies were carried out in apple orchard situated in Budziwój – district of Rzeszów. Dithane Neo Tec 75 WG was applied twice. The initial level of fungicide residue after the treatments amounted 4.09±0.91 mg/kg (I treatment) and 2.41±0.96 mg/kg (II treatment). Half-life period of the fungicide decay was 9 and 14 day: after the first and the second treatment respectively. At harvest time, seven weeks after the second treatment, the detected residue level 0.26±0.06 mg/kg was much higher than acceptable one 0.01 mg/kg.
In 2010, 270 samples of fruits and vegetables from south-eastern Poland were surveyed. In overall 105 samples (39%) tested positive for pesticide residues. One substance was detected in 58 samples and multiple substances were found in 47 sample. The most often detected pesticides were: dithiocarbamates (in 13.0% of samples), captan (9.3%) and pyrimethanil (8.1%). Violations of maximum residue levels (MRL) were found in 2.6 percent of analyzed samples.
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