Validation of quantitative method for azoxystrobin residues in green beans and peas

Abdelraheem, Ehab; Hassan, Sayed M.; Arief, M. M. H.; Mohammad, Somaia G.

doi:10.1016/j.foodchem.2015.02.106

Cited by 30 publications

(18 citation statements)

References 10 publications

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“…The matrix effect (ME) was evaluated by comparing the slope of the calibration curve S of each matrix‐matched standard solution with the solvent standard solution and calculated as follows: 13,14

ME (() %) = \frac{S_{in matrix} - S_{in solvent}}{S_{in solvent}} \times 100

…”

Section: Methodsmentioning

confidence: 99%

Study on degradation behaviour, residue distribution, and dietary risk assessment of propiconazole in celery and onion under field application

Bai

Chen

et al. 2020

J Sci Food Agric

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BACKGROUND Propiconazole is widely used to control fungal diseases in field crops, including celery and onion. The potential risk to the environment and human health has aroused much public concern. Therefore, it is significant to investigate the degradation behaviour, residue distribution, and dietary risk assessment of propiconazole in celery and onion. RESULTS A sensitive analytical method for determination of propiconazole residue in celery and onion was established and validated through high‐performance liquid chromatography tandem mass spectrometry. The average recovery rate of propiconazole ranged from 85.7% to 101.8%, with a relative standard deviation of 2.1–6.3%. For the dissipation kinetics, the data showed that propiconazole in celery and onion was degraded, with half‐lives of 6.1–6.2 days and 8.7–8.8 days respectively. In the terminal residue experiments, the residues of propiconazole were below 4.66 mg kg−1 in celery after application two or three times and were below 0.029 mg kg−1 in onion after application of three or four times with an interval of 14 days under the designed dosages. The chronic and acute dietary exposure assessments for propiconazole were valued by risk quotient, with all values being lower than 100%. CONCLUSION Propiconazole in celery and onion was rapidly degraded following first‐order kinetics models. The dietary risk of propiconazole through celery or onion was negligible to consumers. The study not only offers a valuable reference for reasonable usage of propiconazole on celery and onion, but also facilitates the establishment of maximum residue limits in China. © 2020 Society of Chemical Industry

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ME (() %) = \frac{S_{in matrix} - S_{in solvent}}{S_{in solvent}} \times 100

…”

Section: Methodsmentioning

confidence: 99%

Study on degradation behaviour, residue distribution, and dietary risk assessment of propiconazole in celery and onion under field application

Bai

Chen

et al. 2020

J Sci Food Agric

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“…The residues of some strobilurin fungicides in environment and soil were detected (Flores et al 2007;Campillo et al 2010;Dornellas et al 2013;Abdelraheem et al 2015). But, little is known about its environmental behaviors (e.g., the adsorption/desorption, leaching, and degradation as well as other environmental factors), particularly for azoxystrobin, kresoximmethyl, and phenamacril.…”

Section: Introductionmentioning

confidence: 99%

Desorption and mobilization of three strobilurin fungicides in three types of soil

Han

et al. 2016

Environ Monit Assess

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Phenamacril (JS399-19 with independent intellectual property developed by China), azoxystrobin, and kresoxim-methyl are strobilurin fungicide. Due to their broad spectrum and good control of most of known fungi, strobilurin fungicide has been widely used in agriculture management. Thus, it is important to evaluate their environmental behaviors particularly in soils and underground water. In this study, the sorption/desorption and mobility of strobilurin fungicides in three Chinese soils (Jiangxi red soil, Taihu paddy soil, and Northeast China black soil) were conducted using comprehensively analytic approaches including batch experiment and soil thin-layer chromatography. The strobilurin fungicides were hard to be adsorbed in Jiangxi red soil but had medium adsorption capability in Tanhu paddy soil and Northeast China black soil, while the desorption of three strobilurin fungicides ranked in the order of Jiangxi red soil > Taihu paddy soil > Northeast China black soil. Soil properties including soil organic matter (SOM), pH, and cationic exchange capacity (CEC) affected the adsorption/desorption of the fungicides. Azoxystrobin and kresoxim-methyl had weak mobility in the soils. JS399-19 was moderately mobile in Jiangxi red soil but was not easily moved in Taihu paddy soil and Northeast China black soil. Due to their weak mobility in soils, these strobilurin fungicides tended to remain in the soil phase but not to shift downward to underground water. As azoxystrobin and JS399-19 had a long retention period in soil, there may become persistent residues in the soil environment.

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“…Each experiment was repeated three times, and the calibrations curves relating peak areas against pesticides concentrations were constructed and regression equations were calculated. Linearity was checked using correlation coefficient and calculation of residual percentages (Res %) 40 .…”

Section: Calibration Curves and Linearitymentioning

confidence: 99%

Appraisal for Edible Use of Vegetable Crops Cultivated in Egypt after Treatment with Selected Insecticides and Fungicides: Insights of Dissipation Rates and Pre-harvest Intervals

2021

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An analytical investigation was carried out to study the dissipation rate of two commonly used pesticides, Thiamethoxam (neonicotinoid insecticide) and propamocarb hydrochloride (carbamate fungicide) applied to four vegetable crops: cucumber, zucchini, lettuce and pepper, after openfield application. Samples were harvested according to a scheduled plan followed by QuEChERS extraction, then thiamethoxam residues were analyzed using a GC-ECD method, while propamocarb HCl residues were analyzed using an HPLC-UV method. Validation parameters were attained for both methods and the kinetic profile was studied which fitted the first -order kinetics where k, t ½ and t90 were calculated. The proper pre-harvest interval (PHI) was studied for each crop to ensure that the residues levels declined to reach below the maximum residue limit (MRL) where the crop is suitable for edible use. These values were found to be different from labelled values which proves that the PHIs are greatly affected by changing weather conditions.

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Validation of quantitative method for azoxystrobin residues in green beans and peas

Cited by 30 publications

References 10 publications

Study on degradation behaviour, residue distribution, and dietary risk assessment of propiconazole in celery and onion under field application

Study on degradation behaviour, residue distribution, and dietary risk assessment of propiconazole in celery and onion under field application

Desorption and mobilization of three strobilurin fungicides in three types of soil

Appraisal for Edible Use of Vegetable Crops Cultivated in Egypt after Treatment with Selected Insecticides and Fungicides: Insights of Dissipation Rates and Pre-harvest Intervals

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