Abstract:

Established the method of oxyfluorfen in different solutions by gas chromatography. Under the 500 W high pressure mercury lamp, photolysis of oxyfluorfen in buffer solution of different pH value, the results showed that the photolysis rate were quicker in pH 9 than that in other buffers and are in the order of pH 9>pH 7>pH 5, indicating the photolytic degradation of oxyfluorfen in alkaline solution, maybe result in poor stability. The experiments on influence of initial concentration on photolysis of oxyfluorfen under the 500 W high pressure mercury lamp showed that initial concentrations affected the photodegradation, and they make photolysis haf-life of oxyfluorfen decreased. The half-lives of oxyfluorfen in different buffers of pH 5, pH 7, pH 9 were 63, 20.69, 13.67 min。These can correctly appraise oxyfluorfen in the environment for the photodissociation behavior, as well as provide scientific basis for guiding oxyfluorfen science reasonable use and the correct evaluation in the residue of water environment polyether dynamic and safety effects provide the effective reference data.