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http://dx.doi.org/10.7585/kjps.2017.21.1.17

Dissipation Pattern of Fungicides Boscalid and Pyraclostrobin in Jujube  

Jo, Hyeong-Wook (Bio Convergence Technology Laboratory Environmental Toxicity Evaluation Center, Korea Conformity Laboratories)
Sohn, Sang-Hyun (Croen Chemical Residue Team)
Kim, Kyoung-Jin (Croen Chemical Residue Team)
Hwang, Gi-Jun (Croen Chemical Residue Team)
Jo, Beom-Haeng (Croen Chemical Residue Team)
Gil, Seok-Ju (Croen Chemical Residue Team)
Kwon, Chan-Hyeok (Ministry of Food and Drug Safety)
Moon, Joon-Kwan (Department of Plant Life and Environmental Sciences, Hankyong National University)
Publication Information
The Korean Journal of Pesticide Science / v.21, no.1, 2017 , pp. 17-25 More about this Journal
Abstract
Dissipation pattern and biological half-lives of fungicides boscalid and pyraclostrobin were calculated on jujube. The pesticides were sprayed on jujube in two different field at the standard rate, respectively. The raw agricultural commodities were harvested at 0 (2 hr), 1, 3, 5, 7, 10 and 14 days after treatment, and analyzed by HPLC/DAD. The method limit of quantification (MLOQ) was $0.02mg\;kg^{-1}$ for boscalid and pyraclostrobin. The recovery ranged 101.8~109.3% with below 5% of CV (Coefficient of variation) for boscalid and 104.2~115.4% with below 5% of CV for pyraclostrobin. An average initial deposit at field 1 and field 2 samples were observed 0.40 and $0.48mg\;kg^{-1}$ for boscalid and, 0.76 and $0.57mg\;kg^{-1}$ for pyraclostrobin, respectively. The biological half-lives of field 1 and field 2 were 11.0 and 13.2 day for boscalid, and 6.1 and 12.7 days for pyraclostrobin.
Keywords
biological half-life; boscalid; jujube; pyraclostrobin;
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