The degradation behaviour, residue distribution, and dietary risk assessment of malathion on vegetables and fruits in China by GC-FPD

Liu, Yiping; Liu, Shuangqing; Ya, Zhang; Qin, Dongmei; Zheng, Zhaowen; Zhu, Guangyan; Lv, Yuntao; Liu, Zhao‐Qing; Dong, Zhe; Liao, Xing; Li, Yong

doi:10.1016/j.foodcont.2019.106754

Cited by 47 publications

(18 citation statements)

References 22 publications

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“…Meanwhile, the data demonstrated that the original residue of propiconazole in celery (3.21–8.23 mg kg −1 ) was obviously higher than that in onion (0.079–0.085 mg kg −1 ), and the pesticide dissipates faster in onion than in celery with half‐lives of 6.1–6.2 days and 8.7–8.8 days respectively. The rate of degradation of pesticide residue is affected by environmental conditions, application rate, nature of the pesticide, formulation, and plant species, and so on 23–25 . In this study, the differences in original residues and degradation rates could be caused by plant species.…”

Section: Resultsmentioning

confidence: 88%

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: Resultsmentioning

confidence: 88%

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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“…Where STMR (Supervised Trials Median Residue) is the median of the detected fosthiazate residuals (mg/kg) after 21 days of application, F (Food intake) is the average food consumption (kg/d), bw (body weight) is the average body mass (kg), NEDI is national estimated daily intake [mg/(kg•d)], ADI (acceptable daily intake) is 0.004 mg/(kg bw•d) regulated by China (GB/T2763-2019). Table 1 shows the average daily intake of vegetables and fruits of different population in China (Liu et al, 2019). RQ < 100% indicated that the residual pesticide present in food products did not have unreasonable adverse effects on general population, whereas RQ > 100% indicated pesticide residue may result in a hazard on human health.…”

Section: Dietary Intake Risk Assessmentmentioning

confidence: 99%

Dissipation and residue of fosthiazate in tomato and cherry tomato and a risk assessment of dietary intake

Lin

et al. 2021

Environ Sci Pollut Res

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In this study, the safety and risk of fosthiazate as a nematicide against root-knot nematode in tomato and cherry tomato were evaluated. The dissipation and residue of fosthiazate for 28 days in tomato and cherry tomato were determined and studied by HPLC after simple, rapid pre-treatment. The mean recovery was 83.79 ~ 94.18%, and the relative standard deviation was 3.97 ~ 7.40%. Results showed that the halflives of fosthiazate in tomato (4.81 ~ 5.37 days) were signi cantly lower than that in cherry tomato (5.25 5.73 days). At the pre-harvest interval (PHI) of 21 days, the residues of tomatoes and cherry tomatoes were 0.032 ~ 0.046 mg/kg, which were lower than the maximum residue level established in China. The potential risks of fosthiazate exposure through the dietary intake of tomatoes and cherry tomatoes to different populations were also studied. According to the results of dietary risk assessment, the residual levels of fosthiazate were within the acceptable range of long-term dietary risk in different populations in China within the sampling interval of 21 days after the application of pesticide. Our results show that fosthiazate as a nematicide in the eld control of root-knot nematode has high safety and low risk, and can provide a reference for the safe and reasonable use of fosthiazate as a nematicidein in the eld.

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“…19 These differences may be related to differences in crop varieties, application dosages and times, environment, weather, and crop growth status. 28,29 Based on the above results, tolfenpyrad and dinotefuran were easily dissipated in fresh tea leaves after field application.…”

Section: Dissipation Kinetics Of Tolfenpyrad and Dinotefuran In Fresh Teamentioning

confidence: 79%

Residue behavior, transfer and risk assessment of tolfenpyrad, dinotefuran and its metabolites during tea growing and tea brewing

Bai

Chen

et al. 2021

J Sci Food Agric

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BACKGROUND: Tolfenpyrad and dinotefuran are two representative pesticides used for pest control in tea gardens. Their application may bring about a potential risk to the health of consumers. Therefore, it is essential to investigate the residue behavior, transfer and risk assessment of tolfenpyrad, dinotefuran and metabolites from tea garden to teacup.RESULTS: An effective analytical method was established and validated to simultaneously determine tolfenpyrad, dinotefuran and its metabolites (DN and UF) in tea. The average recoveries of tolfenpyrad, dinotefuran, DN and UF were in the range 72.1-106.3%, with relative standard deviations lower than 11.8%. On the basis of the proposed method, the dissipation of tolfenpyrad and dinotefuran in fresh tea leaves followed first-order kinetics models with half-lives of 4.30-7.33 days and 4.65-5.50 days, respectively. With application amounts of 112.5-168.75 g a.i. ha -1 once or twice, the terminal residues of tolfenpyrad and total dinotefuran in green tea were lower than 19.6 and 7.13 mg kg −1 , respectively, and below their corresponding maximum residue limits . The leaching rates of tolfenpyrad and total dinotefuran during the tea brewing were in the ranges 1.4-2.3% and 93.7-98.1%, respectively. CONCLUSION: Tolfenpyrad and dinotefuran in tea were easily degraded. The RQ c and RQ a values for tolfenpyrad were 37.6% and 5.4%, which were much higher than for dinotefuran at 24.7% and 0.84%, respectively. The data indicated that there was no significant health risk in tea for consumers at the recommended dosages. The results provide scientific data regarding the reasonable use of tolfenpyrad and dinotefuran aiming to ensure safe tea consuption.

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The degradation behaviour, residue distribution, and dietary risk assessment of malathion on vegetables and fruits in China by GC-FPD

Cited by 47 publications

References 22 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

Dissipation and residue of fosthiazate in tomato and cherry tomato and a risk assessment of dietary intake

Residue behavior, transfer and risk assessment of tolfenpyrad, dinotefuran and its metabolites during tea growing and tea brewing

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