African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6865

Dissipation and residue behavior of oxine-copper on litchi field application

Yanjing Xing
  • Yanjing Xing
  • College of Agricultural, Guangxi University, Nanning 530004, PR China.
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Xiaoliang Liu
  • Xiaoliang Liu
  • College of Agricultural, Guangxi University, Nanning 530004, PR China.
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Dongqiang Zeng
  • Dongqiang Zeng
  • Guangxi University Pesticide Environmental Toxicology Research Institute, Nanning 530004, PR China
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  •  Received: 20 March 2014
  •  Published: 22 May 2014

Abstract

An analytical method was established for oxine-copper residues in litchi, litchi pulp and soil. The residue levels and dissipation rates of oxine-copper was detected by high performance liquid chromatography- photodiode array (HPLC-PDA). At three fortification levels of 0.10, 0.50 and 2.00 mg/kg in litchi, litchi pulp and soil, recoveries were in the range 80.1 to 103.5%, with relative standard deviations (RSD) of 1.52 to 12.07%. The limit of quantification (LOQ) of method was 0.01 mg/kg for litchi, litchi pulp and soil. The half-lives of oxine-copper in litchi and soil were 9.12 and 7.02 day, respectively. The final residue levels of oxine-copper in litchi, litchi pulp and soil were lower than 1.99 mg/kg at harvest.

 

Key words: Oxine-copper, pesticide residue, dissipation, litchi, soil.

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