Add time:07/27/2019 Source:sciencedirect.com
The residue levels and dissipation rate of Famoxadone (cas 131807-57-3) in watermelon and soil were determined by HPLC-UVD. The LODs for famoxadone in watermelon, peel, flesh and soil were 0.002 mg/kg (0.004 mg/kg in leaf). The fortified recoveries ranged from 84.91% to 99.41% with relative standard deviations (RSDs) of 0.06–4.50%. The dissipation of famoxadone residue over the time in watermelon leaf and soil fitted to the equation CT=19.695e−0.078T and CT=1.369e−0.129T. The half-lives (T1/2) of famoxadone in watermelon leaf and soil were 9.7 and 5.5 days, respectively. The final residue in watermelon was lower than 0.1 mg/kg at harvest, which suggested the use of this fungicide to be safe to both human and environment. This work would be helpful in establishing the maximum residue limit (MRL) for famoxadone in watermelon in China, and provide guidance to the proper and safe use of this pesticide in agriculture.
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