Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 21

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  fungicide residue
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
This paper presents results of pesticide residues research in berry fruits and fruit juices from the north-eastern Poland in 2005–2009. During five-year testing totally 460 samples of fruit and fruit juices were analysed (mainly raspberries, strawberries and currants). 48.7% (224) samples contained pesticide residues below maximum residue levels 38.0% (175) and above MRLs 10.7% (49). 140 active substances were searched and 32 were found, which generally constituted fungicides (dithiocarbamates, procymidone, flusiazole) and less insecticides (fenitrothion, fenazaquin, chloryrifos). Samples with forbidden plant protection products were also determined like tolylfluanid (F) in strawberries and endosulfan (I) in currants. In 25% samples more than one residue were found (from two to seven residues).
Analysis of pesticide residues was performed by Ultra Performance Liquid Chromatography (UPLC) with Photodiode Array Detector (PDA). Mushroom samples were prepared by acetonitrile extraction. Chromatographic separation was achieved using a BEH C18 analytical column (2.1 mm 􀂰 150 mm), 1.7 μm particle size at flow rate of 0.25 ml/min. Validation studies were carried out on mushroom. In the linear range (0.01 and 0.1 mg/kg) of each pesticide, the correlation coefficient was R2 > 0.99. The relative standard deviation was below 17.1% for all pesticides. The recovery and repeatability of results are in compliance with SANCO/2009 criteria (i.e. average recoveries were in the range 70–120% with RSDs < 20%) for all pesticides The developed method was successfully applied for determination of pesticide residues in mushroom, apple and black currant.
The aim of the study was to evaluate the occurrence of pyrimidine fungicide residues in fruits and vegetables in 2012–2013. Validated analytical methods based on liquid / liquid extraction coupled with gas chromatography with electron capture and nitrogen phosphorus detection (GC-ECD/NPD – gas chromatography with electron capture and nitrogen phosphorus detection) were used for analysis. The total of 704 samples of fruits and vegetables were tested for the presence of pesticide residues, 49 of all samples had residues of pyrimidine fungicides. Cyprodinil and pyrimethanil were the most commonly found residues. In the analysed samples two cases of irregularity associated with the use of preparations of pyrimidine were found, the first was related with the use of nonrecommended plant protection product, the second was related with exceeding the maximum residue levels.
This paper describes a HPLC method with DAD detection for determining a mixture of four trichotecenes B in wheat protected by fungicides. The recoveries of trichotecenes B from wheat treated at two levels of fortification: 0.2 and 0.6 mg/kg for NIV, DON, 15-AcDON and 3-AcDON were: 101.83; 75.78; 84.58; 75.19 and 71.17; 70.24; 87.83; 74.95, respectively. The results confirmed usefulness of this method as easy for determining trichotecenes B in plant material.
In 2011–2013 in the Laboratory of Pesticide Residue Analysis of Plant Protection Institute – National Research Institute in Rzeszów 339 samples of fruits, vegetables and herbs were tested for the presence of dithiocarbamate fungicide residues. Dithiocarbamates were found in 27 (8.0%) analysed samples. No exceeding of Maximum Residue Levels (MRLs) was stated. Dithiocarbamates were detected most frequently in: gooseberries (45.4% of the samples of the crop), red currants (33.3%), black currants (29.6%), pears (18.7%) and peaches (14.3%).
In the years 2011–2013 308 samples of fruits and vegetables were examined under official control of testing pesticide residues in agricultural crops in The Laboratory of Pesticide Residue Research in Sośnicowice. The samples for testing were provided by the Provincial Inspectors State Plant Health and Seed Inspection in Katowice and Opole. Fifty-one active substances (authorized for usage) were detected in analyzed samples. The percentage of samples with residues of active substances in the Silesia province was 17.7% and 15.3% in Opole. One active substance of plant protection products prohibited for use in a given assortment was detected. Information notice was sent using the Rapid Alert System for Food and Feed (RASFF).
A total of 1 352 samples of fresh fruit, vegetables and arable crops of Polish origin were analysed in 2009 in five laboratories of the Institute of Plant Protection – National Research Institute. The monitoring programme covered 54 commodities and 132 pesticides including some isomers and breakdown products. Residues of 43 pesticides, mainly fungicides (24), were detected in 24.5% of samples analysed. Percentage of the samples without pesticide residues was equal to 75.5%. The residues lower than MRLs contained 23.1% of samples analysed. Violations of MRLs were found in 1.4% of the samples. The usage of not approved pesticides were stated in 3.3% of the samples analysed. Residues were detected in 43.3% of fruit samples especially in samples of raspberries (56.4%), apples (50.4%), sour cherries (48.5%), strawberries (44.8%), but the highest percentage of pesticide residues (66.7%) was found both in samples of greenhouse tomatoes and in the samples of celeriac. The samples of other products were less contaminated. Residues of dithiocarbamates were most often detected, in 13.4% of the samples. Four further pesticides captan, linuron, chloropiryfos and carbendazim were found in 8.7%, 5.1%, 4.1% and 4.1% of samples analysed respectively, while the other compounds in less than 2.6% of samples analysed.
In 2009, studies on disappearance of some insecticides and fungicides on carrot fields were carried out. In total, 60 samples of soil, carrot roots and leaves were analysed. In the first test chloropyrifos (Nurelle D 550 EC) was applied only once. Mature carrot roots from that field contained its residues at the level of 0.029±0.008 mg/kg. In the second test chlorpyrifos was applied two times (Nurelle D 550 EC and Dursban 480 EC) and thus mature carrot from that field contained its residues at the level of 0.045±0.0039 mg/kg. In the tests carried out chloropyrifos and azoxystrobin residues in carrot roots were slightly above the level 0.01 mg/kg.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.