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

文献类型： 外文期刊

作者： Bai, Aijuan 1 ; Chen, Ang 2 ; Chen, Wuying 2 ; Luo, Xiangwen 2 ; Liu, Shaowen 3 ; Zhang, Min 2 ; Liu, Yong 1 ; Zhang, Dey 1 ;

作者机构： 1.Hunan Univ, Grad Sch, Longping Branch, Changsha 410125, Peoples R China

2.Hunan Acad Agr Sci, Hunan Plant Protect Inst, Changsha 410125, Peoples R China

3.Hunan Acad Agr Sci, Hunan Inst Agr Environm & Ecol, Changsha 410125, Peoples R China

关键词： propiconazole; celery; onion; residue distribution; degradation; dietary risk assessment

期刊名称：JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE （ 影响因子：3.638； 五年影响因子：3.802 ）

ISSN： 0022-5142

年卷期：

页码：

收录情况： SCI

摘要： 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. (c) 2020 Society of Chemical Industry

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