Photo-Degradation of Cypermethrin in Aqueous Solution Studied by HPLC-DAD

Abstract:

The photo-degradation process of cypermethrin in aqueous solution was studied using the laboratory-built photochemical degradation device and commercial high performance liquid chromatography (HPLC) with ultraviolet-visible absorbance detector and mass spectrometric detector. Spectrometric characteristics of cypermethrin and its main degradation products suggest that cypermethrin could be photo-degradated and converted into smaller molecular under ultraviolet irradiation. The photo-degradation reaction of cypermethrin in aqueous solution is approximately pseudo-first-order reaction. Light strength, pH and salinity have significant effects on the photo-degradaiton reaction of cypermethrin. Mass spectrometric results show that cypermethrin pesticide can be degraded into new and easily photochemical degrading products through the removal of chlorine.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 1044-1048
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.1044
• Online since: January 2013
• Authors: Yan Ru Liang, Zhen Bin Gong, Wen Quan Li
• Keywords: Cypermethrin, Degradation Kinetics, Degradation Process, Degradation Products, Degradation Reaction, Photo-Degradation

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