Famoxadone residue and dissipation in watermelon and soil.
The residue levels and dissipation rate of famoxadone in watermelon and soil were determined by HPLC-UVD. The LODs for famoxadone in watermelon, peel, flesh and soil were 0.002mg/kg (0.004mg/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 C(T)=19.695e(-0.078T) and C(T)=1.369e(-0.129T). The half-lives (T(1/2)) of famoxadone in watermelon leaf and soil were 9.7 and 5.5 days, respectively. The final residue in watermelon was lower than 0.1mg/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.
Liu
Congyun
C
College of Science, China Agricultural University, Beijing 100193, PR China.
Qin
Dongmei
D
Zhao
Yuzhen
Y
Pan
Canping
C
Jiang
Shuren
S
Liu
Fengmao
F
D000383:Agriculture; D002681:China; D002851:Chromatography, High Pressure Liquid; D029773:Citrullus / Q000737:chemistry*; D004784:Environmental Monitoring; D006207:Half-Life; D008689:Methacrylates / Q000032:analysis; D010080:Oxazoles / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D018515:Plant Leaves / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis*; D000073739:Strobilurins; D013997:Time Factors
D008689:Methacrylates; D010080:Oxazoles; D010573:Pesticide Residues; D012989:Soil Pollutants; D000073739:Strobilurins; C401929:famoxadone