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Research Journal of Environmental Toxicology
  Year: 2011 | Volume: 5 | Issue: 5 | Page No.: 316-322
DOI: 10.3923/rjet.2011.316.322
Effect of Light and Temperature on Chlorfenapyr and Identification of its Main Degradation Products
M.A. Kandil, E.S. Swelam, M.M. Abu-Zahw and M.A. Shalby

Abstract:
The direct thermo and photodecomposition of chlorfenapyr was studied. The results show that the loss percentage of the compound was increased with increasing the degree of temperature and the time of exposure. Over 60% of chlorfenapyr residues were degraded after 144, 96 and 48 h of exposure to 30, 40, 50°C, respectively. Also the photo decomposition of chlorfenapyr was increased by the prolongation of exposure period to record 61.93 and 90.07% after 48 h of exposure to direct sunlight and UV-rays, respectively. The residue half life values were 12.03 and 5.71 h after `exposure to direct sunlight and UV-rays, respectively. Four major photo degradation products were isolated for chlorfenapyer (m/z = 408, 353, 284, 202 and 192 and identified by their mass spectra comparing with library scan, which as follows: “N-methoxyethylpyrrole-2-phenyl-3-cyano-4-Bromo-5-difluoromethylinum cation, N-methyl ethyl ether (2-trifluoromethyle-5-pyrrolium cation), 2(P-chlorophenyl)-3-carbonitrile pyrrolium cation and 2 (P-chlorophenyl)-3-cyano-4-oxo-5-trifluoromethyl pyrrolidine.
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How to cite this article:

M.A. Kandil, E.S. Swelam, M.M. Abu-Zahw and M.A. Shalby, 2011. Effect of Light and Temperature on Chlorfenapyr and Identification of its Main Degradation Products. Research Journal of Environmental Toxicology, 5: 316-322.

DOI: 10.3923/rjet.2011.316.322

URL: https://scialert.net/abstract/?doi=rjet.2011.316.322

 
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