fosetyl-al and phosphonic-acid

The epiphytic lichen Pseudevernia furfuracea was exposed to a simulation of drift deposition rate of the fungicide Fosetyl-Al in an indoor controlled environment by testing two exposure factors: pesticide concentrations (based on the application rates of 4 kg ha

Topics: Fungicides, Industrial; Lichens

Topics: Chromatography, High Pressure Liquid; Food Analysis; Limit of Detection; Organophosphorus Compounds; Pesticide Residues; Phosphorous Acids; Reproducibility of Results; Tandem Mass Spectrometry; Vegetables

Cherries are popular fruits due to their health benefits, organoleptic quality, and attractive appearance. Since highly polar pesticides are of low mass and amphoteric character, and are not amenable to traditional multi-residue extraction methods, they are more commonly not included in the pesticide monitoring program. This study aims to determine twelve highly polar pesticide residues in cherry samples intended for export from Turkey. A total of 16,022 cherry samples from 2018−2020 harvests in four production areas of Turkey were analyzed using a modification of the Quick Polar Pesticides method and liquid chromatography-tandem mass spectrometry. The method was validated at two fortification levels (0.01 and 0.05 mg kg−1), and good recoveries (87.4−111.4%) and relative standard deviations (<6%) were achieved for all analytes. The limits of quantification were in the range of 1.08−2.55 μg kg−1. Overall, 28.4% of the analyzed cherry samples were detected with phosphonic acid, calculated as fosetyl aluminium (fosetyl-Al) in amounts up to 77.7 mg kg−1. For 2304 samples (14.4%), the residues exceeded the European Union maximum residue level of 2 mg kg−1. There is no reason to be concerned about long-term exposure to phosphonic acid/fosetyl-Al, and the other highly polar pesticides through the consumption of sweet cherry.

Topics: Aluminum; Food Contamination; Pesticide Residues; Pesticides; Prunus avium; Tandem Mass Spectrometry

Interest in the quantification of highly polar substances in crops has noticeably increased in the last five years. This study was designed to assess quantification of six polar residues, chlorate, ethephon, fosetly-aluminium (fosetyl-Al), glyphosate, phosphonic acid and perchlorate. A total of 2513 pomegranate samples intended for export from Turkey were analysed using the Quick Polar Pesticides (QuPPe) method. The method was in-house validated with very good performance results. The limits of quantification (LOQs) for residues were much lower than the respective EU Maximum Residue Levels (MRLs). Phosphonic acid was detected in 38.5% of pomegranate samples at quantifiable concentrations, calculated as fosetyl-Al. The concentrations ranged between 0.005 and 12.9 mg kg

Topics: Chromatography, Liquid; Food Contamination; Fruit; Organophosphorus Compounds; Pesticide Residues; Phosphorous Acids; Pomegranate; Reproducibility of Results; Tandem Mass Spectrometry

In Japan, the residue definition for fosetyl-Al is "sum of fosetyl-Al and phosphonic acid expressed as fosetyl-Al" and its current provisional maximum residue limit (MRL) in cereals is under review.. For establishment and enforcement of fosetyl-Al MRL in cereals, a new analytical method for fosetyl-Al and phosphonic acid in cereals should be developed and validated.. The new method involves water extraction, cleanup using tandem cation- and anion-exchange mini columns, and determination by LC-MS/MS. It was validated in a single laboratory and multiple laboratories. Using the method, 41 samples of rice, wheat, and barley were analyzed.. In the multiple-laboratory validation: repeatability and reproducibility for three concentrations of fosetyl-Al and phosphonic acid were in ranges of 4.8-20 and 5.9-34%; calculated sum of fosetyl-Al and phosphonic acid, expressed as fosetyl-Al, showed good recoveries; linearity was observed for fosetyl-Al and phosphonic acid in ranges of 0.005-0.4 and 0.025-2.0 mg/kg; and specificity was sufficient. The method was verified for rice matrixes. In 41 samples, phosphonic acid was detected up to 0.2 mg/kg while fosetyl was not.. The method was successfully validated with high precision, accuracy, linearity, and specificity and capable of analyzing fosetyl-Al and phosphonic acid with a practical LOQ of 0.01 and 0.05 mg/kg. The LOQs and concentrations of phosphonic acid in samples indicate that a potential MRL would be 0.5 mg/kg for fosetyl-Al in cereals.. The validated method was simpler than many methods and did not require derivatization, matrix-matched orisotopically-labeled internal standards.

Topics: Chromatography, Liquid; Edible Grain; Food Contamination; Hordeum; Laboratories; Organophosphorus Compounds; Oryza; Phosphorous Acids; Reproducibility of Results; Tandem Mass Spectrometry; Triticum