Photolytic degradation of chlorpyrifos induced by an artificial light source

Chlorpyrifos dissolved in methanol was illuminated by the Xe polychromatic light source, which is commonly used as artificial solar radiation source. Photolytic degradation of the parent compound was followed by UV/Vis spectrophotometry and GC/MS technique. GC/MS measurementsindicated that very few pyridine containing intermediates are formed during the degradation process. After 2 hours of illumination almost no chlorpyrifos could be observed and significant mineralization (formation of carbon dioxide, water, alkyl phosphates and sulfates) was achieved.Physical chemistry 2004 : 7th international conference on fundamental and applied aspects of physical chemistry; Belgrade (Serbia); 21-23 September 200