Effect of tea components on γ-rays degradation of endosulfan and bifenthrin in hexane solution

The irradiation degradation of endosulfan and bifenthrin and the effect of tea components on the degradation were investigated. The γ-rays were used to study the effect of the irradiation on the degradation of endosulfan and bifenthrin in hexane solution meanwhile the effect of tea components, such as tea polyphenol, caffeine, theanine and vitamin C on the irradiation degradation of endosulfan and bifenthrin was also investigated. The results show that at the same concentration the irradiation degradation effects of endosulfan and bifenthrin can improved with absorbed doses, while at the same absorbed dose the irradiation degradation effects can decrease with increment of concentration for endosulfan, and can increase initially and then decrease for bifenthrin. Additionally, tea polyphenol, caffeine, theanine and vitamin C can promote the irradiation degradation of endosulfan, but only theanine can make irradiation degradation of bifenthrin worse. (authors)