Chlorfenapyr residue analysis
WebJan 9, 2024 · In the processing process of both black tea and green tea, the chlorfenapyr residue decreased by 59.1–67.6% compared with the residue in tea shoots due to high vapor pressure (1.2 × 10⁻² mPa ... WebNov 1, 2005 · The chlorfenapyr analysis method of residue, its degradation and final residue in soil and cabbage were studied. Residues of chlorfenapyr were extracted …
Chlorfenapyr residue analysis
Did you know?
WebFeb 1, 2024 · When chlorfenapyr formulations were applied according to the double recommended dose, the final residues in cabbage were much lower than the USA … Webmulti-residue pesticide analysis method employing QuEChERS sample preparation kits, sample measure-ment by the newly developed Thermo Scientific™ TSQ™ 8000 Pesticide Analyzer system and rapid data analysis by Thermo Scientific™ TraceFinder™ software. 3. Scope The objective of this validation study was to prove a
WebApr 22, 2010 · Chlorfenapyr is a pyrrole group of insecticide, [4-bromo-2- (4-chlorophenyl)-1-ethoxymethyl-5-trifluoromethyl-1 H -pyrrole-3-carbonitrile]used as broad spectrum … WebOct 29, 2024 · The final residues of chlorfenapyr in celeries at Lhasa and Pengzhou were 5.074 ± 0.144 mg/kg and 5.981 ± 0.234 mg/kg after 7 days of spraying, respectively. When chlofenapyr was sprayed to soils only, the average root concentration factor of chlorfenapyr were 3.57–4.02, while the average translocation factor of chlorfenapyr in leaves and ...
WebJan 9, 2024 · The dissipation of chlorfenapyr followed first-order kinetics. The compound showed less persistence in both the vegetables and soil as the calculated half-life values of chlorfenapyr ranged between 4.54 and 7.74 days considering two different doses and seasons. The residue was below detection limit in all the untreated plant and soil samples. WebThe results of molecular docking are shown in Figure 3, which presents appropriate interactions with the main amino acid residues at the active site of the target protein. The docking pose analysis suggested that compounds 4j , 5a , and 5j could easily fit in the catalytic pocket of AChE, showing grid scores of −64.66 ( 4j ), −65.41 ( 5a ...
WebAug 4, 2011 · The calculated residues half life values of chlorfenapyr were 90.35, 55.67 and 20.63 h at 30, 40 and 50°C, respectively. Previous results clearly indicate that the rate of degradation of the chlorfenapyr was influenced by several factors including the chemical structure, vapor pressure, temperature and the period of exposure.
WebOct 10, 2024 · The chlorfenapyr residues in the entire tea chain, i.e., in tea planting, tea processing, and tea brewing, were systematically investigated. The degradation rate constants of chlorfenapyr in the tea plants ranged from 0.2460 to 0.2870 with the half-life of 2.4-3.0 days, and 87.5-89.9% of the chlorfe … hyper xenophanesWebJan 6, 2024 · In this study, a method for the residue analysis of chlorfenapyr and its metabolite tralopyril, on radish and radish leaves was established, and the residue samples of chlorfenapyr in six fields were detected by the method. The results showed that the degradation rate of chlorfenapyr in radish leaves was fast, and the degradation half-life … hyperx flight 2WebHome Food and Agriculture Organization of the United Nations hyperx flagship storeWebTolerances for chlorfenapyr of 0.50 ppm in/on cottonseed and 0.01, 0.15, 0.01, and 0.10, respectively for milk, milk fat, meat, and fat of cattle, goats, hogs, horses, and sheep were recommended for dietary risk assessments. A residue value of 0.3 ppm was recommended for the dietary risk hyperx firepulseWebNov 1, 2005 · The chlorfenapyr analysis method of residue, its degradation and final residue in soil and cabbage were studied. Residues of chlorfenapyr were extracted from soil and cabbage with acetone/water, purified by liquid/liquid partition and chromatographic column, concentrated to a small volume, and then determined by HPLC equipped with … hyperx firmware updater downloadWebTherefore, studies on the residue analysis, degradation evaluation and dietary risk assessment based on the complete residue definition of chlorfenapyr on these four vegetables were essential and urgently needed. A reliable analytical method was developed and applied to simultaneously determine the content of chlorfenapyr and its metabolite ... hyperx feaWebMay 1, 2024 · The chlorfenapyr residue was analyzed according to the guidelines of the European Reference Laboratories for Residues of Pesticides (5). The limit of detection was 0.01 mg kg −1 , whereas the limit of quantification was 0.03 mg kg −1 , which was determined by using signal-to-noise ratios of 3 and 10, respectively. hyper x elite mechanical keyboard