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The Degradation Patterns of Two Pesticides in Spinach by Cultivation, Storage and Washing  

Seo, Jung-Mi (Public Health and Environment institute of Gwangju)
Ha, Dong-Ryong (Public Health and Environment institute of Gwangju)
Lee, Hyang-Hee (Public Health and Environment institute of Gwangju)
Oh, Mu-Sul (Public Health and Environment institute of Gwangju)
Park, Jong-Jin (Water Quality Research Institute of Gwangju)
Shin, Hyeon-Wo (Gwangju Agriculture Technology Center)
Kim, Eun-Sun (Public Health and Environment institute of Gwangju)
Publication Information
Journal of Food Hygiene and Safety / v.25, no.2, 2010 , pp. 91-99 More about this Journal
Abstract
Two pesticides commonly used in spinach were subjected to a field residue trial to ensure safety of terminal residues in the harvest. The residual patterns of two pesticides, which were Azoxystrobin and chlorpyrifos were examined after applying with the recommended dose and their $DT_{50}$ were calculated. Also degradation patterns of pesticides at storage $4^{\circ}C$ were compared to those at $20^{\circ}C$, and removal rates of pesticides by washing spinach with water were measured. Biological half-lives of azoxystrobin and chlorpyrifos were 3.2~3.8 and 3.8~4.7 days, respectively. During the storage period, the degradation patterns were appeared more obviously at $20^{\circ}C$ than $4^{\circ}C$. Removal rates of azoxystrobin and chlorpyrifos were 9.6~90.0% and 17.7~85.8% by various washing methods.
Keywords
spinach; azoxystrobin; chlorpyrifos; cultivation; storage; washing;
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Times Cited By KSCI : 10  (Citation Analysis)
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