Dissipation Behavior and Residue Distribution of Famoxadone and Cymoxanil in Cucumber and Soil Ecosystem Under Open-Fiel
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Dissipation Behavior and Residue Distribution of Famoxadone and Cymoxanil in Cucumber and Soil Ecosystem Under Open-Field Conditions Jifa Rao & Ling Chen & Yujia Xiang & Jiayu Li & Xiao Chen & Yaoyu Zhou
Received: 16 June 2020 / Accepted: 16 October 2020 # Springer Nature Switzerland AG 2020
Abstract In this study, a practical and excellent method was used to determine the famoxadone and cymoxanil via high-performance liquid chromatography equipped utilizing ultraviolet detector lamp (HPLC-UV) for investigating the dissipation behavior and residue distribution of famoxadone and cymoxanil in cucumber and soil ecosystem. The limit of quantification (LOQS) of famoxadone and cymoxanil in cucumber were 0.50, 1.00, 2.00 and 0.05, 0.50, 1.00 mg kg−1 in soil, Highlights • A method for detecting famoxadone and cymoxanil in cucumber/ soil was developed. • Famoxadone/cymoxanil residue dissipation followed the firstorder reaction kinetic. • The half-lives of famoxadone and cymoxanil in cucumber were 1.34–2.52 days. • The half-lives of famoxadone and cymoxanil in soil ecosystem were 3.08–16.12 days.
respectively. The limit of detection (LODS) of both famoxadone and cymoxanil were 8.0 ng. The average recoveries (n = 5) of the fungicide ranged from 84.10 to 108.02% with the relative standard deviations (RSDs) typically < 9.23%. The fungicide was applied to cucumber and soil at the range of doses (275.6–413.4 g a.i.ha −1 ) three or four times. The half-lives of famoxadone and cymoxanil in cucumber and soil were 1.34–16.12 days, which followed the first-order chemical reaction kinetics equation Ct = C0 × e-kt. The residues of famoxadone and cymoxanil in cucumber at the pre-harvest interval (PHI, 3 days) were below 8.0 × 10−8 g and 8.0 × 10−9 g, respectively. Overall, this study evaluated the food safety and the environmental fate of famoxadone and cymoxanil in cucumber and soil ecosystem. In addition, this study would promote the series of work on the pesticide exposure assessment of these fungicides as well.
J. Rao : J. Li (*) School of Architecture and Art, Central South University, Changsha 410083, China e-mail: [email protected]
Keywords Cucumber . Soil . Famoxadone . Cymoxanil . Dissipation behavior
J. Rao Nanchang City Land Resources Survey and Planning Institute Co. LTD, Nanchang 330000, China
1 Introduction
L. Chen : Y. Xiang : Y. Zhou (*) College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China e-mail: [email protected] X. Chen College of Sports and Art, Hunan Agricultural University, Changsha 410128, China
Cucumber is one of the most popular and economically important vegetable crops in the world (Halo et al. 2018; Yang et al. 2018). Because it is rich in vitamin B2 and vitamin C, cucumber is extensively used in the cosmetics industry and the pharmaceutical industry (Mateljan 2007; Lin et al. 2018). In addition, cucumber possesses the anti-diabetic, lower cholesterol, and
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antioxidant properties. Cucumber also has the cleaning effect for cleaning the accumu
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