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http://dx.doi.org/10.3839/jabc.2022.023

Residual characteristics of insecticide flubendiamide in kale  

Kim, Hyun-Jin (Joint Experimental Laboratory, Hankyong National University)
Hwang, Kyu-Won (Department of Plant Resources and Landscape Architecture, Hankyong National University)
Sun, Jung-Hun (Hansalim Agro-Food Analysis Center, Hankyong National University Industry Academic Cooperation Foundation)
Lee, Tae-Hyun (Enbio Co., Ltd. Life Science Research Center)
Jeong, Kyoung-Su (Enbio Co., Ltd. Life Science Research Center)
Moon, Joon-Kwan (Department of Plant Resources and Landscape Architecture, Hankyong National University)
Publication Information
Journal of Applied Biological Chemistry / v.65, no.3, 2022 , pp. 173-181 More about this Journal
Abstract
This study was carried out to investigate the residual characteristics of flubendiamide in kale to establish pre-harvest residue limits (PHRL) and the removal efficiency according to the washing solvent and method. Field tests were conducted at two different greenhouses, field 1 (Anseong-si, Gyeonggi-do) and field 2 (Incheon-si, Gyeonggi-do). According to the safe use guidelines kale was sprayed with flubendiamide twice every 10 days and harvested 0 (after 2 h), 1, 2, 3, 5, 7 and 10 days after the final application. The biological half-live of flubendiamide in kale was calculated based on dissipation curves of the pesticide in samples analyzed by liquid chromatography coupled with tandem mass spectrometry. In the analysis, method limits of quantitation (MLOQ) were 0.01 mg/kg, and recoveries performed with two different fortification levels of 10 MLOQ and maximum residue limit (0.7 mg/kg) were 104.2±3.6 and 101.9±10.2%, respectively. The dissipation rate constant of flubendiamide in kales were 0.2437 at field 1 and 0.1981 at field 2. PHRL calculation equations obtained using the dissipation constants estimated as follows: if the residual concentration of flubendiamide in kale on 10 days before harvest is less than 8.0 mg/kg, the residual concentration on the harvest would be under MRL. The removal of flubendiamide from kale was the greatest when it was washed with vinegar (39.8%), followed by baking soda (31.7%), calcium powder (30.2%), neutral detergent (27.2%), and tap water (15.9%). The results of this study would be useful for both farmers and consumers to produce or consume safe agricultural products.
Keywords
Biological half-lives; Flubendiamide; Pre-harvest residue limits; Washing;
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Times Cited By KSCI : 4  (Citation Analysis)
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