Dissipation of fluazinam in citrus groves and a risk assessment for its dietary intake

Zhao, Jiewen; Tan, Zhenchao; Wen, Ying; Fan, Shuai; Liu, Chenglan

doi:10.1002/jsfa.10227

Cited by 9 publications

(6 citation statements)

References 17 publications

(30 reference statements)

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“…where NEDI (mg kg −1 bw) is the national estimated daily intake, NESTI (mg kg −1 bw) is the national estimated short‐term intake, STMR i (mg kg −1 ) is supervised trials median residue level, HR (mg kg −1 ) is the highest residue of supervised trials, and F i (kg) is the consumption of one crop for the general population, ADI (mg kg −1 bw) is the acceptable daily intake, ARfD (mg kg −1 bw) is acute reference dose, and bw (kg) is the average body weight of a Chinese adult, which is identified as 63 kg 22 …”

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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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 dissipation of pesticides in soil is usually fitted with first-order kinetic curves [ 31 , 32 ], with the R 2 ranging from 0.4490 to 0.5323. Compared with A0, the residues of TBM in A1 decreased significantly.…”

Section: Resultsmentioning

confidence: 99%

Effect of Brassinolide on Soil Microorganisms in Millet Field Polluted by Tribenuron-Methyl

et al. 2023

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Tribenuron-methyl is used to control broad-leaved weeds and has a promising application prospect in millet fields. However, its negative impact on soil ecology cannot be ignored. Brassinosteroids have been widely reported to enhance plant resistance to stress, but information on brassinosteroids for the remediation of pesticide-contaminated soils is limited. Under field conditions, brassinosteroids were applied to explore their effects on the residues of tribenuron-methyl, soil enzyme activity, soil microbiol community, and millet yield. After applying brassinosteroids according to the dose of 150 mL hm−2, the degradation rate of tribenuron-methyl accelerated. Brassinolide stimulated the activities of catalase and dehydrogenase, while the activities of sucrase and alkaline phosphatase were inhibited. The results of high-throughput sequencing showed that brassinosteroids inhibited the growth of Verrucomicrobia, Ascomycota, and Mortierellomycota and promoted the abundance of cyanobacteria. Additionally, brassinosteroids could also significantly increase the diversity index and change the community structure of soil bacteria and fungi. Further, the predicted function results indicated that brassinosteroids changed some metabolic-related ecological functions of the soil. We also found that brassinolide could increase millet yields by 2.4% and 13.6%. This study provides a theoretical basis for the safe use of tribenuron-methyl in millet fields and a new idea for the treatment of pesticide residues in soil.

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“…The dissipation kinetics of cuaminosulfate in soil samples were determined using first-order kinetics according to GB/T 31270.1-2014 [ 41 ]. The equations are as follows: C t = C 0 × e −kt T 1/2 = ln2/k where C t is the residue (mg/kg) at time t (days), C 0 is the initial residue (mg/kg), k represents a first-order kinetic degradation rate constant, and T 1/2 is the half-life [ 42 ].…”

Section: Methodsmentioning

confidence: 99%

“…where C t is the residue (mg/kg) at time t (days), C 0 is the initial residue (mg/kg), k represents a first-order kinetic degradation rate constant, and T 1/2 is the half-life [42].…”

Section: Dissipation Kineticsmentioning

confidence: 99%

Optimizing Analysis Methods: Rapid and Accurate Determination of Cuaminosulfate Residues with LC-MS/MS Based on Box–Behnken Design Study

He,

Wang,

Zhang

et al. 2024

Molecules

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In view of the defects in the previous detection of cuaminosulfate, which only focused on the analysis of copper ions, there is currently no analysis method available to determine the actual state of cuaminosulfate as chelated or bound. In order to investigate the dissipation and terminal residues in soil and watermelon of cuaminosulfate for food safety and environmental risk, a highly effective technique was developed to detect cuaminosulfate residues in watermelon and soil, and field experiments were conducted in China. After single-factor experiments, residual cuaminosulfate in samples was extracted by pure water, purified using a liquid–liquid approach combined with a dispersive solid-phase extraction, and detected by liquid chromatography tandem mass spectrometry (LC-MS/MS). The Box–Behnken design (BBD) study was used to find the optimal solutions for the time of liquid–liquid purification, the amount of extraction solvent, and the amounts of cleanup sorbents for the analytical method. The average recovery of the method was in the range of 80.0% to 101.1%, the average relative standard deviation (RSD) was 5.3–9.9%, and the detection limit was lower than 0.05 mg/kg. The BBD study not only improved the extraction rate of the method, but also saved time and was operated easily. The final residues of cuaminosulfate in watermelon at different sampling intervals were all lower than 0.05 mg/kg under field conditions. The cuaminosulfate in soils dissipated following exponential kinetics, with half-life values in the range of 9.39 to 12.58 days, which varied by different locations. Based on the validated method, food safety residues and soil residues can be determined rapidly and accurately.

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Dissipation of fluazinam in citrus groves and a risk assessment for its dietary intake

Cited by 9 publications

References 17 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

Effect of Brassinolide on Soil Microorganisms in Millet Field Polluted by Tribenuron-Methyl

Optimizing Analysis Methods: Rapid and Accurate Determination of Cuaminosulfate Residues with LC-MS/MS Based on Box–Behnken Design Study

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